Home / 3,912.66-5,399.19-2,143.98

Finding the Fourth Proportional to 3,912.66, 5,399.19 and 2,143.98

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Solution

The fourth proportional to 3,912.66, 5,399.19 and 2,143.98 is: 2,958.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.66 : 5,399.19 = 2,143.98 : x
  2. Step 2: Convert to fraction form
    3,912.66/5,399.19 = 2,143.98/x
  3. Step 3: Cross multiply
    3,912.66x = 5,399.19 × 2,143.98
  4. Step 4: Simplify right side
    3,912.66x = 11,575,755.38
  5. Step 5: Solve for x
    x = 11,575,755.38/3,912.66
  6. Step 6: Final answer
    x = 2,958.54

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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.