Home / 3,912.80-5,399.66-2,144.42

Finding the Fourth Proportional to 3,912.80, 5,399.66 and 2,144.42

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Solution

The fourth proportional to 3,912.80, 5,399.66 and 2,144.42 is: 2,959.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.80 : 5,399.66 = 2,144.42 : x
  2. Step 2: Convert to fraction form
    3,912.80/5,399.66 = 2,144.42/x
  3. Step 3: Cross multiply
    3,912.80x = 5,399.66 × 2,144.42
  4. Step 4: Simplify right side
    3,912.80x = 11,579,138.90
  5. Step 5: Solve for x
    x = 11,579,138.90/3,912.80
  6. Step 6: Final answer
    x = 2,959.30

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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.