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Finding the Fourth Proportional to 8,982.71, 13,480.22 and 3,139.32

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Solution

The fourth proportional to 8,982.71, 13,480.22 and 3,139.32 is: 4,711.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,982.71 : 13,480.22 = 3,139.32 : x
  2. Step 2: Convert to fraction form
    8,982.71/13,480.22 = 3,139.32/x
  3. Step 3: Cross multiply
    8,982.71x = 13,480.22 × 3,139.32
  4. Step 4: Simplify right side
    8,982.71x = 42,318,708.55
  5. Step 5: Solve for x
    x = 42,318,708.55/8,982.71
  6. Step 6: Final answer
    x = 4,711.13

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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.