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Finding the Fourth Proportional to 8,630.38, 12,947.88 and 4,679.92

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Solution

The fourth proportional to 8,630.38, 12,947.88 and 4,679.92 is: 7,021.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.38 : 12,947.88 = 4,679.92 : x
  2. Step 2: Convert to fraction form
    8,630.38/12,947.88 = 4,679.92/x
  3. Step 3: Cross multiply
    8,630.38x = 12,947.88 × 4,679.92
  4. Step 4: Simplify right side
    8,630.38x = 60,595,042.57
  5. Step 5: Solve for x
    x = 60,595,042.57/8,630.38
  6. Step 6: Final answer
    x = 7,021.13

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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.