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Finding the Fourth Proportional to 21,661, 29,892.27 and 11,725

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Solution

The fourth proportional to 21,661, 29,892.27 and 11,725 is: 16,180.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661 : 29,892.27 = 11,725 : x
  2. Step 2: Convert to fraction form
    21,661/29,892.27 = 11,725/x
  3. Step 3: Cross multiply
    21,661x = 29,892.27 × 11,725
  4. Step 4: Simplify right side
    21,661x = 350,486,865.75
  5. Step 5: Solve for x
    x = 350,486,865.75/21,661
  6. Step 6: Final answer
    x = 16,180.55

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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.