$\"\"$ $\"\"$

\

The proportion is $\"\"$

\

$\"\"$ (Apply cross products property)

\

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

\

$\"\"$ (Divide each side by 15)

\

$\"\"$ (Cancel common terms)

\

$\"\"$ (Divide: $\"\"$ ) $\"\"$

\

The value of $\"\"$ .