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

\

The proportion is $\"\"$ .

\

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

\

$\"\"$ (Apply distributive property: $\"\"$ )

\

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

\

According to subtraction property of equality: if $\"\"$ than $\"\"$ .

\

$\"\"$ (Subtract 4 from each side)

\

$\"\"$ (Apply additive inverse property: $\"\"$ )

\

$\"\"$ (Apply additive identity property: $\"\"$ )

\

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

\

$\"\"$ (Divide each side by 4)

\

$\"\"$ (Cancel common terms)

\

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

\

The value of $\"\"$ .