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Finding the Fourth Proportional to 8,324.52, 12,490.20 and 3,940.80

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Solution

The fourth proportional to 8,324.52, 12,490.20 and 3,940.80 is: 5,912.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,324.52 : 12,490.20 = 3,940.80 : x
  2. Step 2: Convert to fraction form
    8,324.52/12,490.20 = 3,940.80/x
  3. Step 3: Cross multiply
    8,324.52x = 12,490.20 × 3,940.80
  4. Step 4: Simplify right side
    8,324.52x = 49,221,380.16
  5. Step 5: Solve for x
    x = 49,221,380.16/8,324.52
  6. Step 6: Final answer
    x = 5,912.82

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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.