Home / 57,721.38-86,590.71-20,285.88

Finding the Fourth Proportional to 57,721.38, 86,590.71 and 20,285.88

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Solution

The fourth proportional to 57,721.38, 86,590.71 and 20,285.88 is: 30,431.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,721.38 : 86,590.71 = 20,285.88 : x
  2. Step 2: Convert to fraction form
    57,721.38/86,590.71 = 20,285.88/x
  3. Step 3: Cross multiply
    57,721.38x = 86,590.71 × 20,285.88
  4. Step 4: Simplify right side
    57,721.38x = 1,756,568,752.17
  5. Step 5: Solve for x
    x = 1,756,568,752.17/57,721.38
  6. Step 6: Final answer
    x = 30,431.86

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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.