Ratios, Rates, And Proportions Worksheet With Answers Page 5
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16Example 6
Are these true proportions?
a.
b.
c.
a. True since
b. True since
c. False since
Try this! Determine if each of the following is a true proportion.
a.
b.
c.
Answer:
a. False
b. True
c. True
Solving proportions
Solving a proportion means to find an unknown quantity within a proportion. We can do so
using cross-multiplication. As an example, let’s solve the proportion,
In order for this proportion to be true, we must have
. So,
Solving this equation by dividing both sides by 91, we find that
.
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