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Finding the Fourth Proportional to 8,081.70, 11,183.85 and 7,887.30

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Solution

The fourth proportional to 8,081.70, 11,183.85 and 7,887.30 is: 10,914.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.70 : 11,183.85 = 7,887.30 : x
  2. Step 2: Convert to fraction form
    8,081.70/11,183.85 = 7,887.30/x
  3. Step 3: Cross multiply
    8,081.70x = 11,183.85 × 7,887.30
  4. Step 4: Simplify right side
    8,081.70x = 88,210,380.11
  5. Step 5: Solve for x
    x = 88,210,380.11/8,081.70
  6. Step 6: Final answer
    x = 10,914.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.