Home / 38,589.20-57,851.40-20,121.20

Finding the Fourth Proportional to 38,589.20, 57,851.40 and 20,121.20

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Solution

The fourth proportional to 38,589.20, 57,851.40 and 20,121.20 is: 30,164.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,589.20 : 57,851.40 = 20,121.20 : x
  2. Step 2: Convert to fraction form
    38,589.20/57,851.40 = 20,121.20/x
  3. Step 3: Cross multiply
    38,589.20x = 57,851.40 × 20,121.20
  4. Step 4: Simplify right side
    38,589.20x = 1,164,039,589.68
  5. Step 5: Solve for x
    x = 1,164,039,589.68/38,589.20
  6. Step 6: Final answer
    x = 30,164.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.