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Finding the Fourth Proportional to 42,476.70, 63,715.02 and 12,490.92

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Solution

The fourth proportional to 42,476.70, 63,715.02 and 12,490.92 is: 18,736.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,476.70 : 63,715.02 = 12,490.92 : x
  2. Step 2: Convert to fraction form
    42,476.70/63,715.02 = 12,490.92/x
  3. Step 3: Cross multiply
    42,476.70x = 63,715.02 × 12,490.92
  4. Step 4: Simplify right side
    42,476.70x = 795,859,217.62
  5. Step 5: Solve for x
    x = 795,859,217.62/42,476.70
  6. Step 6: Final answer
    x = 18,736.37

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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.