Home / 20,553.20-28,363.41-11,121.75

Finding the Fourth Proportional to 20,553.20, 28,363.41 and 11,121.75

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Solution

The fourth proportional to 20,553.20, 28,363.41 and 11,121.75 is: 15,348.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.20 : 28,363.41 = 11,121.75 : x
  2. Step 2: Convert to fraction form
    20,553.20/28,363.41 = 11,121.75/x
  3. Step 3: Cross multiply
    20,553.20x = 28,363.41 × 11,121.75
  4. Step 4: Simplify right side
    20,553.20x = 315,450,755.17
  5. Step 5: Solve for x
    x = 315,450,755.17/20,553.20
  6. Step 6: Final answer
    x = 15,348.02

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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.