To solve the equation \( 4b = 36 \), you need to isolate \( b \). You can do this by dividing both sides of the equation by 4:
\[ b = \frac{36}{4} \]
Calculating the right side:
\[ b = 9 \]
Therefore, the value of \( b \) that is a solution to the equation is \( 9 \).