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Finding the Fourth Proportional to 8,252.80, 12,379.20 and 7,331.20

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Solution

The fourth proportional to 8,252.80, 12,379.20 and 7,331.20 is: 10,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,252.80 : 12,379.20 = 7,331.20 : x
  2. Step 2: Convert to fraction form
    8,252.80/12,379.20 = 7,331.20/x
  3. Step 3: Cross multiply
    8,252.80x = 12,379.20 × 7,331.20
  4. Step 4: Simplify right side
    8,252.80x = 90,754,391.04
  5. Step 5: Solve for x
    x = 90,754,391.04/8,252.80
  6. Step 6: Final answer
    x = 10,996.80

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Similar ratio
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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.