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Finding the Fourth Proportional to 8,337.40, 12,491.70 and 5,255.80

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Solution

The fourth proportional to 8,337.40, 12,491.70 and 5,255.80 is: 7,874.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,337.40 : 12,491.70 = 5,255.80 : x
  2. Step 2: Convert to fraction form
    8,337.40/12,491.70 = 5,255.80/x
  3. Step 3: Cross multiply
    8,337.40x = 12,491.70 × 5,255.80
  4. Step 4: Simplify right side
    8,337.40x = 65,653,876.86
  5. Step 5: Solve for x
    x = 65,653,876.86/8,337.40
  6. Step 6: Final answer
    x = 7,874.62

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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.