# Finding the width of a shape

• Sep 29th 2012, 02:31 PM
thegreatmcgonagall
Finding the width of a shape
Hello everyone

I’m very much a layman when it comes to mathematics and my education in this subject is quite poor, so I was wondering if someone could help me solve a maths problem?

The problem is this (please click below image)…
Attachment 24974

Above, on the left, is a diagram of a rectangle; its height is 7.3cm and its width is 5.1cm. To the right is the same rectangle - only larger, with a height of 10.9cm. However, the width of this second rectangle is unknown.

Therefore, I would like to know how to find the width of this second rectangle using the length and width of the first rectangle. Would someone kindly show me how to do this as simply as possible as well as showing me the steps toward the solution so I can work it out longhand.

Many thanks

Christopher

p.s I know with this being the ‘New Users’ forum that this may not be the right place to post this query, so if someone could suggest the best forum to place this in then it would be very much appreciated.
• Sep 29th 2012, 02:43 PM
Plato
Re: Finding the width of a shape
$\displaystyle \frac{W}{10.9}=\frac{5.1}{7.3}$
• Sep 29th 2012, 02:47 PM
emakarov
Re: Finding the width of a shape