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Finding the Fourth Proportional to 20,099.96, 27,737 and 11,147.28

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Solution

The fourth proportional to 20,099.96, 27,737 and 11,147.28 is: 15,382.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,099.96 : 27,737 = 11,147.28 : x
  2. Step 2: Convert to fraction form
    20,099.96/27,737 = 11,147.28/x
  3. Step 3: Cross multiply
    20,099.96x = 27,737 × 11,147.28
  4. Step 4: Simplify right side
    20,099.96x = 309,192,105.36
  5. Step 5: Solve for x
    x = 309,192,105.36/20,099.96
  6. Step 6: Final answer
    x = 15,382.72

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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.