Answer
4
Work Step by Step
The proportion is set up as a/5=12/15. To find "a", we must look at the denominators. We had to divide 15 by 3 to get to 5, so we have to divide 12 by 3 to get "a" which is 4.
Algebra 2 Common Core
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133186024
ISBN 13:
978-0-13318-602-4
Skills Handbook - Ratios and Proportions - Exercises - Page 974: 6
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