# Math Help - proportions

1. ## 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?

2. Originally Posted by sanee66
RSTUV and WXYZA are similiar with corresponding sides RS and WX.
This is the key.

So you can take the rest like that.

3. $\frac{ST}{XY}=\frac{14}{3m-11}=4\Rightarrow 4(3m-11)=14\Rightarrow 12m=58$