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Finding the Fourth Proportional to 8,331.20, 12,493.20 and 3,399.20

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Solution

The fourth proportional to 8,331.20, 12,493.20 and 3,399.20 is: 5,097.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,331.20 : 12,493.20 = 3,399.20 : x
  2. Step 2: Convert to fraction form
    8,331.20/12,493.20 = 3,399.20/x
  3. Step 3: Cross multiply
    8,331.20x = 12,493.20 × 3,399.20
  4. Step 4: Simplify right side
    8,331.20x = 42,466,885.44
  5. Step 5: Solve for x
    x = 42,466,885.44/8,331.20
  6. Step 6: Final answer
    x = 5,097.33

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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.