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Finding the Fourth Proportional to 42,374.52, 63,559.95 and 12,791.47

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Solution

The fourth proportional to 42,374.52, 63,559.95 and 12,791.47 is: 19,186.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,374.52 : 63,559.95 = 12,791.47 : x
  2. Step 2: Convert to fraction form
    42,374.52/63,559.95 = 12,791.47/x
  3. Step 3: Cross multiply
    42,374.52x = 63,559.95 × 12,791.47
  4. Step 4: Simplify right side
    42,374.52x = 813,025,034.73
  5. Step 5: Solve for x
    x = 813,025,034.73/42,374.52
  6. Step 6: Final answer
    x = 19,186.65

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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.