How do you determine whether the two ratios form a proportion: #6/9, 10/15#?

1 Answer
EZ as pi
Nov 18, 2016

The ratios are equal and form a proportion.

Explanation:

To find out if #6 : 9 = 10: 15#

#6/9 and 10/15" "larr# cross- multiply

#6xx15 = 9xx10#

#90 = 90#

Therefore the ratios are equal and form a proportion.
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OR
Change each ratio to its simplest form:

#(6div3)/(9div3) and (10div5)/(15div5)#

#2/3 = 2/3#

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