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Finding the Fourth Proportional to 8,221.38, 12,339.38 and 3,841.30

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Solution

The fourth proportional to 8,221.38, 12,339.38 and 3,841.30 is: 5,765.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,221.38 : 12,339.38 = 3,841.30 : x
  2. Step 2: Convert to fraction form
    8,221.38/12,339.38 = 3,841.30/x
  3. Step 3: Cross multiply
    8,221.38x = 12,339.38 × 3,841.30
  4. Step 4: Simplify right side
    8,221.38x = 47,399,260.39
  5. Step 5: Solve for x
    x = 47,399,260.39/8,221.38
  6. Step 6: Final answer
    x = 5,765.37

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1.5x scale

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.