Find four-thirds of $\frac{9}{2}$.
To find four-thirds of something, I need to multiply it by $\frac{4}{3}$. So I need to multiply $\frac{9}{2}$ by $\frac{4}{3}$. To multiply fractions, I multiply the numerators and the denominators. The numerator of the product is $9 \times 4 = 36$. The denominator of the product is $2 \times 3 = 6$. So the product is $\frac{36}{6}$. I can simplify this fraction by dividing both the numerator and the denominator by 6. The simplified fraction is $\frac{6}{1}$. This is the same as 6. 