Home / 20,505.20-28,297.24-11,553.04

Finding the Fourth Proportional to 20,505.20, 28,297.24 and 11,553.04

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Solution

The fourth proportional to 20,505.20, 28,297.24 and 11,553.04 is: 15,943.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.20 : 28,297.24 = 11,553.04 : x
  2. Step 2: Convert to fraction form
    20,505.20/28,297.24 = 11,553.04/x
  3. Step 3: Cross multiply
    20,505.20x = 28,297.24 × 11,553.04
  4. Step 4: Simplify right side
    20,505.20x = 326,919,145.61
  5. Step 5: Solve for x
    x = 326,919,145.61/20,505.20
  6. Step 6: Final answer
    x = 15,943.23

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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.