Home / 3,923.56-5,414.54-2,155.20

Finding the Fourth Proportional to 3,923.56, 5,414.54 and 2,155.20

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Solution

The fourth proportional to 3,923.56, 5,414.54 and 2,155.20 is: 2,974.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.56 : 5,414.54 = 2,155.20 : x
  2. Step 2: Convert to fraction form
    3,923.56/5,414.54 = 2,155.20/x
  3. Step 3: Cross multiply
    3,923.56x = 5,414.54 × 2,155.20
  4. Step 4: Simplify right side
    3,923.56x = 11,669,422.00
  5. Step 5: Solve for x
    x = 11,669,422.00/3,923.56
  6. Step 6: Final answer
    x = 2,974.19

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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.