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Finding the Fourth Proportional to 20,504.96, 28,296.96 and 11,552.64

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Solution

The fourth proportional to 20,504.96, 28,296.96 and 11,552.64 is: 15,942.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,504.96 : 28,296.96 = 11,552.64 : x
  2. Step 2: Convert to fraction form
    20,504.96/28,296.96 = 11,552.64/x
  3. Step 3: Cross multiply
    20,504.96x = 28,296.96 × 11,552.64
  4. Step 4: Simplify right side
    20,504.96x = 326,904,591.97
  5. Step 5: Solve for x
    x = 326,904,591.97/20,504.96
  6. Step 6: Final answer
    x = 15,942.71

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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.