To solve the equation $\frac{3}{2} = \frac{x}{12}$, we can use cross-multiplication.

Cross-multiplying gives: $3 \times 12 = 2 \times x$

This simplifies to: $36 = 2x$

Now, solve for $x$ by dividing both sides of the equation by 2: $x = \frac{36}{2} = 18$

Thus, $x = 18$.

Do you want more details, or do you have any questions?

Here are 5 related questions:

1. How do you cross-multiply to solve for a variable in a fraction?
2. What happens when both sides of an equation have fractions?
3. Can you solve $\frac{4}{5} = \frac{y}{20}$ using the same method?
4. How would you verify if your solution for $x$ is correct?
5. What are some real-world applications of solving proportions?

Tip: Always double-check your solution by substituting the value of the variable back into the original equation.