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Finding the Fourth Proportional to 8,379.89, 11,644.43 and 8,288.76

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Solution

The fourth proportional to 8,379.89, 11,644.43 and 8,288.76 is: 11,517.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.89 : 11,644.43 = 8,288.76 : x
  2. Step 2: Convert to fraction form
    8,379.89/11,644.43 = 8,288.76/x
  3. Step 3: Cross multiply
    8,379.89x = 11,644.43 × 8,288.76
  4. Step 4: Simplify right side
    8,379.89x = 96,517,906.33
  5. Step 5: Solve for x
    x = 96,517,906.33/8,379.89
  6. Step 6: Final answer
    x = 11,517.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.