Home / 54,121.97-81,183.06-20,857.70

Finding the Fourth Proportional to 54,121.97, 81,183.06 and 20,857.70

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Solution

The fourth proportional to 54,121.97, 81,183.06 and 20,857.70 is: 31,286.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,121.97 : 81,183.06 = 20,857.70 : x
  2. Step 2: Convert to fraction form
    54,121.97/81,183.06 = 20,857.70/x
  3. Step 3: Cross multiply
    54,121.97x = 81,183.06 × 20,857.70
  4. Step 4: Simplify right side
    54,121.97x = 1,693,292,113.52
  5. Step 5: Solve for x
    x = 1,693,292,113.52/54,121.97
  6. Step 6: Final answer
    x = 31,286.59

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1.5x scale

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.