Home / 38,447.97-57,690.38-20,917.79

Finding the Fourth Proportional to 38,447.97, 57,690.38 and 20,917.79

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Solution

The fourth proportional to 38,447.97, 57,690.38 and 20,917.79 is: 31,386.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,447.97 : 57,690.38 = 20,917.79 : x
  2. Step 2: Convert to fraction form
    38,447.97/57,690.38 = 20,917.79/x
  3. Step 3: Cross multiply
    38,447.97x = 57,690.38 × 20,917.79
  4. Step 4: Simplify right side
    38,447.97x = 1,206,755,253.86
  5. Step 5: Solve for x
    x = 1,206,755,253.86/38,447.97
  6. Step 6: Final answer
    x = 31,386.71

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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.