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Math Help - proportions

  1. #1
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    Question proportions

    RSTUV and WXYZA are similiar with corresponding sides RS and WX. If ST=14, XY=3m-11 with a ratio of similiarty of 4, what is 12m?
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  2. #2
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    Quote Originally Posted by sanee66 View Post
    RSTUV and WXYZA are similiar with corresponding sides RS and WX.
    This is the key.

    So you can take the rest like that.
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  3. #3
    MHF Contributor red_dog's Avatar
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    \frac{ST}{XY}=\frac{14}{3m-11}=4\Rightarrow 4(3m-11)=14\Rightarrow 12m=58
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