Choice Bhoice C is the correct answer. When solving division equations, we multiply both sides by the denumber.

1. Start with the equation: $\frac{x}{12} = 4$
2. Multiply both sides by 12: $x = 4 \times 12$
3. Calculate: $x = 48$
4. Verify: $\frac{48}{12} = 4$ ✓

💡 Quick Pattern: For $\frac{x}{a} = b$, the solution is always $x = ab$ (multiply the right side by the denominator).

Choice Bhoice A is incorrect because this results from dividing 12 by 4 instead of multiplying: $\frac{12}{4} = 3$. This is backwards thinking.

Choice Bhoice D is incorrect because this comes from adding: $12 + 4 = 16$. Addition is not the inverse of division.

Choice Bhoice D is incorrect because this results from dividing 4 by 12: $\frac{4}{12} \approx 0.33$. This divides in the wrong direction.