SOLUTION: My homework says; Use cross Products to determine whether or not the ratio is a proportion. Select = on the blank if the pair of ratios is a proportion; select not = if it is not.

Algebra ->  Proportions -> SOLUTION: My homework says; Use cross Products to determine whether or not the ratio is a proportion. Select = on the blank if the pair of ratios is a proportion; select not = if it is not.       Log On


   

Question 603905: My homework says; Use cross Products to determine whether or not the ratio is a proportion. Select = on the blank if the pair of ratios is a proportion; select not = if it is not.
the work problem look like this;

_5_
8
Select = ≠
_20__
30

I don't understand how to do this or how to do it.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I think you mean
5/8 & 20/30
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Cross multiply and see if they're equal.
5*30 =? 8*20
150 =? 160
no, they're not equal.
--> 5/8 is not equal to 20/30
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That's all.