Answer
$x=12$
Work Step by Step
We are given the proportion $\frac{6}{x}=\frac{4}{8}$. We can set the cross products equal to each other and solve for the unknown variable.
$6\times8=x\times4$
$48=4x$
Divide both sides by 4.
$x=12$
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 5 - Ratio and Proportion - 5.4 Solving Problems - 5.4 Exercises - Page 356: 12
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