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Finding the Fourth Proportional to 42,397.84, 63,631.32 and 21,627.28

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Solution

The fourth proportional to 42,397.84, 63,631.32 and 21,627.28 is: 32,458.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,397.84 : 63,631.32 = 21,627.28 : x
  2. Step 2: Convert to fraction form
    42,397.84/63,631.32 = 21,627.28/x
  3. Step 3: Cross multiply
    42,397.84x = 63,631.32 × 21,627.28
  4. Step 4: Simplify right side
    42,397.84x = 1,376,172,374.41
  5. Step 5: Solve for x
    x = 1,376,172,374.41/42,397.84
  6. Step 6: Final answer
    x = 32,458.55

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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.