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Math Help - using ratio to find a number

  1. #1
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    using ratio to find a number

    Hi everyone,

    First post. Can't figure this out. It's been awhile.

    Anyhow, here we go:

    if 29 is to 11438

    and

    -14 is to 11417

    what is 0 equivalent to?

    Thanks in advance!
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by amedhussaini View Post
    Hi everyone,

    First post. Can't figure this out. It's been awhile.

    Anyhow, here we go:

    if 29 is to 11438

    and

    -14 is to 11417

    what is 0 equivalent to?

    Thanks in advance!
    If \frac{29}{11438} \ \ and \ \ -\frac{14}{11417}, then what is 0 equivalent to??

    I'm not sure what it is you're actually trying to find. What does 0 have to do with the two ratios you wrote?
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  3. #3
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    Hello

    Hi Masters,

    Thank you for the reply.

    The 0 is a zero line. Values are assigned based on certain criteria.

    In 1 step forward, 29 is equal to 11438. In the next step forward, -14 is equal to 11417. I'm trying to find what the zero line is equivalent to.

    (this is for an automated stock trading system I'm working on)

    Thanks..
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  4. #4
    MHF Contributor
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    If no other restrictions are given, then I assume the curve containing the 11438 and 11417 is linear or a straight line.

    Draw the figure.
    On a (x,y) set of axes, plot the two given points (-14,11417) and (29,11438).
    The idea is to get the y-coordinate when x = 0.

    Draw the horizontal line y = 11417.

    A right triangle is formed whose
    >>>vertical leg is (11438 -11417) = 21
    >>>horizontal leg is (14 +29) = 43
    >>>hypotenuse is unknown

    Let c = vertical line segment along the y-axis, or x=0, from the hypotenuse to the horizontal leg.

    By proportion,
    c/14 = 21/43
    c = 14*21/43 = 6.8372

    Therefore, 0 is to (11417 +6.8372) = 11423.8372 ------answer.

    Umm, I think you should have said "28 is to 11438". Not the posted 29.
    Because if it were 28. then
    c = 14*21/42 = 7
    and then 0 is to 11424 ------**
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  5. #5
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    Very enlightening post, thank you. I will apply the principles you outlined.


    Thank you very much, Ticbol.
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  6. #6
    Senior Member bkarpuz's Avatar
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    Exclamation

    Are you sure that this is just a straight line problem?
    May be there is a coding that maps 29\to11438 and -14\to11417, and asks what 0 should be under this coding?
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