Home / 3,923.66-5,414.78-2,155.39

Finding the Fourth Proportional to 3,923.66, 5,414.78 and 2,155.39

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Solution

The fourth proportional to 3,923.66, 5,414.78 and 2,155.39 is: 2,974.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.66 : 5,414.78 = 2,155.39 : x
  2. Step 2: Convert to fraction form
    3,923.66/5,414.78 = 2,155.39/x
  3. Step 3: Cross multiply
    3,923.66x = 5,414.78 × 2,155.39
  4. Step 4: Simplify right side
    3,923.66x = 11,670,962.66
  5. Step 5: Solve for x
    x = 11,670,962.66/3,923.66
  6. Step 6: Final answer
    x = 2,974.51

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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.