Home / 3,923.86-5,414.94-2,155.42

Finding the Fourth Proportional to 3,923.86, 5,414.94 and 2,155.42

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Solution

The fourth proportional to 3,923.86, 5,414.94 and 2,155.42 is: 2,974.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.86 : 5,414.94 = 2,155.42 : x
  2. Step 2: Convert to fraction form
    3,923.86/5,414.94 = 2,155.42/x
  3. Step 3: Cross multiply
    3,923.86x = 5,414.94 × 2,155.42
  4. Step 4: Simplify right side
    3,923.86x = 11,671,469.97
  5. Step 5: Solve for x
    x = 11,671,469.97/3,923.86
  6. Step 6: Final answer
    x = 2,974.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.