Home / 3,912.36-5,399.13-2,143.85

Finding the Fourth Proportional to 3,912.36, 5,399.13 and 2,143.85

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Solution

The fourth proportional to 3,912.36, 5,399.13 and 2,143.85 is: 2,958.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.36 : 5,399.13 = 2,143.85 : x
  2. Step 2: Convert to fraction form
    3,912.36/5,399.13 = 2,143.85/x
  3. Step 3: Cross multiply
    3,912.36x = 5,399.13 × 2,143.85
  4. Step 4: Simplify right side
    3,912.36x = 11,574,897.85
  5. Step 5: Solve for x
    x = 11,574,897.85/3,912.36
  6. Step 6: Final answer
    x = 2,958.55

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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.