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Finding the Fourth Proportional to 8,726.38, 13,030.29 and 8,489.90

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Solution

The fourth proportional to 8,726.38, 13,030.29 and 8,489.90 is: 12,677.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,726.38 : 13,030.29 = 8,489.90 : x
  2. Step 2: Convert to fraction form
    8,726.38/13,030.29 = 8,489.90/x
  3. Step 3: Cross multiply
    8,726.38x = 13,030.29 × 8,489.90
  4. Step 4: Simplify right side
    8,726.38x = 110,625,891.65
  5. Step 5: Solve for x
    x = 110,625,891.65/8,726.38
  6. Step 6: Final answer
    x = 12,677.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.