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Finding the Fourth Proportional to 17,871.11, 24,665.09 and 9,915.90

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Solution

The fourth proportional to 17,871.11, 24,665.09 and 9,915.90 is: 13,685.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,871.11 : 24,665.09 = 9,915.90 : x
  2. Step 2: Convert to fraction form
    17,871.11/24,665.09 = 9,915.90/x
  3. Step 3: Cross multiply
    17,871.11x = 24,665.09 × 9,915.90
  4. Step 4: Simplify right side
    17,871.11x = 244,576,454.69
  5. Step 5: Solve for x
    x = 244,576,454.69/17,871.11
  6. Step 6: Final answer
    x = 13,685.58

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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.