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Finding the Fourth Proportional to 8,631.67, 12,883.46 and 7,440.61

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Solution

The fourth proportional to 8,631.67, 12,883.46 and 7,440.61 is: 11,105.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.67 : 12,883.46 = 7,440.61 : x
  2. Step 2: Convert to fraction form
    8,631.67/12,883.46 = 7,440.61/x
  3. Step 3: Cross multiply
    8,631.67x = 12,883.46 × 7,440.61
  4. Step 4: Simplify right side
    8,631.67x = 95,860,801.31
  5. Step 5: Solve for x
    x = 95,860,801.31/8,631.67
  6. Step 6: Final answer
    x = 11,105.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.