Answer
12 ft, 18 ft, 24 ft
Work Step by Step
Write a proportion using the given scale. Cross multiply to solve for x.
$\frac{\frac{1}{4}in}{1ft}=\frac{3in}{x\ ft}$
$\frac{1}{4}\times x=3\times 1$
$\frac{1}{4}x=3$
$\frac{1}{4}x\times4=3\times4$
$x=12$
$\frac{\frac{1}{4}in}{1ft}=\frac{4\frac{1}{2}in}{x\ ft}$
$\frac{1}{4}\times x=4\frac{1}{2}\times 1$
$\frac{1}{4}x=\frac{9}{2}$
$\frac{1}{4}x\times4=\frac{9}{2}\times4$
$x=\frac{36}{2}$
$x=18$
$\frac{\frac{1}{4}in}{1ft}=\frac{6in}{x\ ft}$
$\frac{1}{4}\times x=6\times 1$
$\frac{1}{4}x=6$
$\frac{1}{4}x\times4=6\times4$
$x=24$