Home / 15.63-23.42-12.80

Finding the Fourth Proportional to 15.63, 23.42 and 12.80

Calculator

Solution

The fourth proportional to 15.63, 23.42 and 12.80 is: 19.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.63 : 23.42 = 12.80 : x
  2. Step 2: Convert to fraction form
    15.63/23.42 = 12.80/x
  3. Step 3: Cross multiply
    15.63x = 23.42 × 12.80
  4. Step 4: Simplify right side
    15.63x = 299.78
  5. Step 5: Solve for x
    x = 299.78/15.63
  6. Step 6: Final answer
    x = 19.18

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.