Use a proportion to solve the problem.
-Martin can paint $1840 \mathrm{ft}^{2}$ with 4 gal of paint. How many 1 -gal cans does he need in order to paint a $17,000-\mathrm{ft}^{2}$ wall?
A) 37 cans
B) 39 cans
C) 10 cans
D) 148 cans

Question

Quizplus · Accepted Answer

To solve this, set up a proportion comparing the two situations: $\frac{1840 \text{ ft}^2}{4 \text{ gal}} = \frac{17000 \text{ ft}^2}{x \text{ gal}}$. Solving for $x$ gives $x = \frac{17000 \text{ ft}^2}{460 \text{ ft}^2/\text{gal}} = 37 \text{ gal}$, so Martin needs 37 1-gal cans.

Use a Proportion to Solve the Problem 1840ft21840 \mathrm{ft}^{2}1840ft2 With 4 Gal of Paint

Use a Proportion to Solve the Problem $1840 \mathrm{ft}^{2}$ With 4 Gal of Paint