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Finding the Fourth Proportional to 8,354, 12,531.16 and 3,909.20

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Solution

The fourth proportional to 8,354, 12,531.16 and 3,909.20 is: 5,863.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,354 : 12,531.16 = 3,909.20 : x
  2. Step 2: Convert to fraction form
    8,354/12,531.16 = 3,909.20/x
  3. Step 3: Cross multiply
    8,354x = 12,531.16 × 3,909.20
  4. Step 4: Simplify right side
    8,354x = 48,986,791.13
  5. Step 5: Solve for x
    x = 48,986,791.13/8,354
  6. Step 6: Final answer
    x = 5,863.87

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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.