H/15 = 16/3 proportion

H/16 = 15/3 Cross multiply: H * 3 = 15 * 16 Simplifying H * 3 = 15 * 16 Reorder the terms for easier multiplication: 3H = 15 * 16 Multiply 15 * 16 3H = 240 Solving 3H = 240 Solving for variable 'H'. Move all terms containing H to the left, all other terms to the right. Divide each side by '3'. H = 80 Simplifying H = 80