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Finding the Fourth Proportional to 8,702.92, 12,013.30 and 5,167.88

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Solution

The fourth proportional to 8,702.92, 12,013.30 and 5,167.88 is: 7,133.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,702.92 : 12,013.30 = 5,167.88 : x
  2. Step 2: Convert to fraction form
    8,702.92/12,013.30 = 5,167.88/x
  3. Step 3: Cross multiply
    8,702.92x = 12,013.30 × 5,167.88
  4. Step 4: Simplify right side
    8,702.92x = 62,083,292.80
  5. Step 5: Solve for x
    x = 62,083,292.80/8,702.92
  6. Step 6: Final answer
    x = 7,133.62

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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.