Home / 20,553.43-28,363.76-11,121.97

Finding the Fourth Proportional to 20,553.43, 28,363.76 and 11,121.97

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Solution

The fourth proportional to 20,553.43, 28,363.76 and 11,121.97 is: 15,348.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.43 : 28,363.76 = 11,121.97 : x
  2. Step 2: Convert to fraction form
    20,553.43/28,363.76 = 11,121.97/x
  3. Step 3: Cross multiply
    20,553.43x = 28,363.76 × 11,121.97
  4. Step 4: Simplify right side
    20,553.43x = 315,460,832.20
  5. Step 5: Solve for x
    x = 315,460,832.20/20,553.43
  6. Step 6: Final answer
    x = 15,348.33

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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.