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Finding the Fourth Proportional to 42,651.72, 63,957.84 and 15,977.88

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Solution

The fourth proportional to 42,651.72, 63,957.84 and 15,977.88 is: 23,959.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,651.72 : 63,957.84 = 15,977.88 : x
  2. Step 2: Convert to fraction form
    42,651.72/63,957.84 = 15,977.88/x
  3. Step 3: Cross multiply
    42,651.72x = 63,957.84 × 15,977.88
  4. Step 4: Simplify right side
    42,651.72x = 1,021,910,692.58
  5. Step 5: Solve for x
    x = 1,021,910,692.58/42,651.72
  6. Step 6: Final answer
    x = 23,959.43

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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.