Answer
16.5
Work Step by Step
Given $\frac{11}{14}$=$\frac{b}{21}$
Cross multiply.
14b=11(21)
14b=231
b=16.5
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 7 - Similarity - 7-1 Ratios and Proportions - Practice and Problem-Solving Exercises - Page 436: 22
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