$\"\"$

\

The proportion is $\"\"$ .

\

Apply cross product property: If $\"\"$ , then $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Add 27 to each side.

\

$\"\"$

\

$\"\"$

\

Divide each side by 18.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

The value of $\"\"$ .