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Finding the Fourth Proportional to 29,179, 40,267.02 and 15,931

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Solution

The fourth proportional to 29,179, 40,267.02 and 15,931 is: 21,984.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,179 : 40,267.02 = 15,931 : x
  2. Step 2: Convert to fraction form
    29,179/40,267.02 = 15,931/x
  3. Step 3: Cross multiply
    29,179x = 40,267.02 × 15,931
  4. Step 4: Simplify right side
    29,179x = 641,493,895.62
  5. Step 5: Solve for x
    x = 641,493,895.62/29,179
  6. Step 6: Final answer
    x = 21,984.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.