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Finding the Fourth Proportional to 42,462.90, 63,694.17 and 10,872.90

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Solution

The fourth proportional to 42,462.90, 63,694.17 and 10,872.90 is: 16,309.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,462.90 : 63,694.17 = 10,872.90 : x
  2. Step 2: Convert to fraction form
    42,462.90/63,694.17 = 10,872.90/x
  3. Step 3: Cross multiply
    42,462.90x = 63,694.17 × 10,872.90
  4. Step 4: Simplify right side
    42,462.90x = 692,540,340.99
  5. Step 5: Solve for x
    x = 692,540,340.99/42,462.90
  6. Step 6: Final answer
    x = 16,309.30

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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.