Home / 20,661.38-28,512.89-11,229.97

Finding the Fourth Proportional to 20,661.38, 28,512.89 and 11,229.97

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Solution

The fourth proportional to 20,661.38, 28,512.89 and 11,229.97 is: 15,497.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.38 : 28,512.89 = 11,229.97 : x
  2. Step 2: Convert to fraction form
    20,661.38/28,512.89 = 11,229.97/x
  3. Step 3: Cross multiply
    20,661.38x = 28,512.89 × 11,229.97
  4. Step 4: Simplify right side
    20,661.38x = 320,198,784.82
  5. Step 5: Solve for x
    x = 320,198,784.82/20,661.38
  6. Step 6: Final answer
    x = 15,497.45

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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.