Home / 20,860.92-31,105.31-18,542.70

Finding the Fourth Proportional to 20,860.92, 31,105.31 and 18,542.70

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Solution

The fourth proportional to 20,860.92, 31,105.31 and 18,542.70 is: 27,648.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.92 : 31,105.31 = 18,542.70 : x
  2. Step 2: Convert to fraction form
    20,860.92/31,105.31 = 18,542.70/x
  3. Step 3: Cross multiply
    20,860.92x = 31,105.31 × 18,542.70
  4. Step 4: Simplify right side
    20,860.92x = 576,776,463.14
  5. Step 5: Solve for x
    x = 576,776,463.14/20,860.92
  6. Step 6: Final answer
    x = 27,648.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.