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Finding the Fourth Proportional to 8,640.86, 12,961.26 and 3,450.38

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Solution

The fourth proportional to 8,640.86, 12,961.26 and 3,450.38 is: 5,175.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.86 : 12,961.26 = 3,450.38 : x
  2. Step 2: Convert to fraction form
    8,640.86/12,961.26 = 3,450.38/x
  3. Step 3: Cross multiply
    8,640.86x = 12,961.26 × 3,450.38
  4. Step 4: Simplify right side
    8,640.86x = 44,721,207.47
  5. Step 5: Solve for x
    x = 44,721,207.47/8,640.86
  6. Step 6: Final answer
    x = 5,175.55

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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.