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Finding the Fourth Proportional to 8,630.97, 12,930.78 and 3,954.87

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Solution

The fourth proportional to 8,630.97, 12,930.78 and 3,954.87 is: 5,925.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.97 : 12,930.78 = 3,954.87 : x
  2. Step 2: Convert to fraction form
    8,630.97/12,930.78 = 3,954.87/x
  3. Step 3: Cross multiply
    8,630.97x = 12,930.78 × 3,954.87
  4. Step 4: Simplify right side
    8,630.97x = 51,139,553.90
  5. Step 5: Solve for x
    x = 51,139,553.90/8,630.97
  6. Step 6: Final answer
    x = 5,925.12

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1.5x scale

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.