Home / 20,650.68-28,510.92-13,589.10

Finding the Fourth Proportional to 20,650.68, 28,510.92 and 13,589.10

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Solution

The fourth proportional to 20,650.68, 28,510.92 and 13,589.10 is: 18,761.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.68 : 28,510.92 = 13,589.10 : x
  2. Step 2: Convert to fraction form
    20,650.68/28,510.92 = 13,589.10/x
  3. Step 3: Cross multiply
    20,650.68x = 28,510.92 × 13,589.10
  4. Step 4: Simplify right side
    20,650.68x = 387,437,742.97
  5. Step 5: Solve for x
    x = 387,437,742.97/20,650.68
  6. Step 6: Final answer
    x = 18,761.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.