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Finding the Fourth Proportional to 8,679.67, 13,019.10 and 3,481.90

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Solution

The fourth proportional to 8,679.67, 13,019.10 and 3,481.90 is: 5,222.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.67 : 13,019.10 = 3,481.90 : x
  2. Step 2: Convert to fraction form
    8,679.67/13,019.10 = 3,481.90/x
  3. Step 3: Cross multiply
    8,679.67x = 13,019.10 × 3,481.90
  4. Step 4: Simplify right side
    8,679.67x = 45,331,204.29
  5. Step 5: Solve for x
    x = 45,331,204.29/8,679.67
  6. Step 6: Final answer
    x = 5,222.69

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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.