Question

Set up a proportion and solve.
Find the cost of 3 scarves if 2 scarves cost $22.80.

Answer 1

Answer: $34.20

Step-by-step explanation:

2 scarves = $22.80

22.80 ÷ 2 = $11.40

11.40 x 3 = $34.20

To check your work you could do:

$22.80 + $11.40 = $34.20

or

$34.20 ÷ 3 = $11.40

Answer 2

`\begin{array}{ccll} scarves&\$\\ \cline{1-2} 2 & 22.80\\ 3& x \end{array} \implies \cfrac{2}{3}~~=~~\cfrac{22.80}{x} \\\\\\ 2x=3(22.80)\implies x=\cfrac{3(22.80)}{2}\implies x=34.2`