Answer:
Proportion states that two fractions or ratios are equal.
Let x be the closing cost amount.
As per the statement:
Tina has to pay 4 percent of the purchase price toward closing costs for her mortgage. If the purchase price is $275,000.
Purchased Price = $275,000
then, by definition of proportion :

By cross multiply we have;
1,100,000 = 100x
Divide both sides by 100 we have;
11,000 = x
or
x = $ 11,000
Therefore, the closing cost amount is, 11,000