Home / 21,001.59-31,493.10-11,138.61

Finding the Fourth Proportional to 21,001.59, 31,493.10 and 11,138.61

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Solution

The fourth proportional to 21,001.59, 31,493.10 and 11,138.61 is: 16,702.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.59 : 31,493.10 = 11,138.61 : x
  2. Step 2: Convert to fraction form
    21,001.59/31,493.10 = 11,138.61/x
  3. Step 3: Cross multiply
    21,001.59x = 31,493.10 × 11,138.61
  4. Step 4: Simplify right side
    21,001.59x = 350,789,358.59
  5. Step 5: Solve for x
    x = 350,789,358.59/21,001.59
  6. Step 6: Final answer
    x = 16,702.99

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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.