Home / 20,432.28-28,198.59-13,731.87

Finding the Fourth Proportional to 20,432.28, 28,198.59 and 13,731.87

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Solution

The fourth proportional to 20,432.28, 28,198.59 and 13,731.87 is: 18,951.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.28 : 28,198.59 = 13,731.87 : x
  2. Step 2: Convert to fraction form
    20,432.28/28,198.59 = 13,731.87/x
  3. Step 3: Cross multiply
    20,432.28x = 28,198.59 × 13,731.87
  4. Step 4: Simplify right side
    20,432.28x = 387,219,372.06
  5. Step 5: Solve for x
    x = 387,219,372.06/20,432.28
  6. Step 6: Final answer
    x = 18,951.35

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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.