Home / 21,493.12-32,187.84-13,691.20

Finding the Fourth Proportional to 21,493.12, 32,187.84 and 13,691.20

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Solution

The fourth proportional to 21,493.12, 32,187.84 and 13,691.20 is: 20,503.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,493.12 : 32,187.84 = 13,691.20 : x
  2. Step 2: Convert to fraction form
    21,493.12/32,187.84 = 13,691.20/x
  3. Step 3: Cross multiply
    21,493.12x = 32,187.84 × 13,691.20
  4. Step 4: Simplify right side
    21,493.12x = 440,690,155.01
  5. Step 5: Solve for x
    x = 440,690,155.01/21,493.12
  6. Step 6: Final answer
    x = 20,503.78

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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.