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Finding the Fourth Proportional to 7,997.78, 11,998.80 and 2,732.78

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Solution

The fourth proportional to 7,997.78, 11,998.80 and 2,732.78 is: 4,099.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,997.78 : 11,998.80 = 2,732.78 : x
  2. Step 2: Convert to fraction form
    7,997.78/11,998.80 = 2,732.78/x
  3. Step 3: Cross multiply
    7,997.78x = 11,998.80 × 2,732.78
  4. Step 4: Simplify right side
    7,997.78x = 32,790,110.66
  5. Step 5: Solve for x
    x = 32,790,110.66/7,997.78
  6. Step 6: Final answer
    x = 4,099.90

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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.