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Finding the Fourth Proportional to 8,917.11, 13,368.56 and 4,234.77

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Solution

The fourth proportional to 8,917.11, 13,368.56 and 4,234.77 is: 6,348.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917.11 : 13,368.56 = 4,234.77 : x
  2. Step 2: Convert to fraction form
    8,917.11/13,368.56 = 4,234.77/x
  3. Step 3: Cross multiply
    8,917.11x = 13,368.56 × 4,234.77
  4. Step 4: Simplify right side
    8,917.11x = 56,612,755.66
  5. Step 5: Solve for x
    x = 56,612,755.66/8,917.11
  6. Step 6: Final answer
    x = 6,348.78

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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.