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Finding the Fourth Proportional to 8,643.38, 12,972.35 and 3,449.25

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Solution

The fourth proportional to 8,643.38, 12,972.35 and 3,449.25 is: 5,176.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.38 : 12,972.35 = 3,449.25 : x
  2. Step 2: Convert to fraction form
    8,643.38/12,972.35 = 3,449.25/x
  3. Step 3: Cross multiply
    8,643.38x = 12,972.35 × 3,449.25
  4. Step 4: Simplify right side
    8,643.38x = 44,744,886.86
  5. Step 5: Solve for x
    x = 44,744,886.86/8,643.38
  6. Step 6: Final answer
    x = 5,176.78

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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.