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Finding the Fourth Proportional to 42,331, 63,489.24 and 19,843.96

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Solution

The fourth proportional to 42,331, 63,489.24 and 19,843.96 is: 29,762.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,331 : 63,489.24 = 19,843.96 : x
  2. Step 2: Convert to fraction form
    42,331/63,489.24 = 19,843.96/x
  3. Step 3: Cross multiply
    42,331x = 63,489.24 × 19,843.96
  4. Step 4: Simplify right side
    42,331x = 1,259,877,938.99
  5. Step 5: Solve for x
    x = 1,259,877,938.99/42,331
  6. Step 6: Final answer
    x = 29,762.54

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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.