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Finding the Fourth Proportional to 7,951.92, 11,919.68 and 5,755.20

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Solution

The fourth proportional to 7,951.92, 11,919.68 and 5,755.20 is: 8,626.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,951.92 : 11,919.68 = 5,755.20 : x
  2. Step 2: Convert to fraction form
    7,951.92/11,919.68 = 5,755.20/x
  3. Step 3: Cross multiply
    7,951.92x = 11,919.68 × 5,755.20
  4. Step 4: Simplify right side
    7,951.92x = 68,600,142.34
  5. Step 5: Solve for x
    x = 68,600,142.34/7,951.92
  6. Step 6: Final answer
    x = 8,626.87

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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.