Home / 21,132.28-31,691.58-9,453.88

Finding the Fourth Proportional to 21,132.28, 31,691.58 and 9,453.88

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Solution

The fourth proportional to 21,132.28, 31,691.58 and 9,453.88 is: 14,177.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.28 : 31,691.58 = 9,453.88 : x
  2. Step 2: Convert to fraction form
    21,132.28/31,691.58 = 9,453.88/x
  3. Step 3: Cross multiply
    21,132.28x = 31,691.58 × 9,453.88
  4. Step 4: Simplify right side
    21,132.28x = 299,608,394.33
  5. Step 5: Solve for x
    x = 299,608,394.33/21,132.28
  6. Step 6: Final answer
    x = 14,177.76

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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.