Home / 3,908.10-5,393.15-2,139.73

Finding the Fourth Proportional to 3,908.10, 5,393.15 and 2,139.73

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Solution

The fourth proportional to 3,908.10, 5,393.15 and 2,139.73 is: 2,952.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.10 : 5,393.15 = 2,139.73 : x
  2. Step 2: Convert to fraction form
    3,908.10/5,393.15 = 2,139.73/x
  3. Step 3: Cross multiply
    3,908.10x = 5,393.15 × 2,139.73
  4. Step 4: Simplify right side
    3,908.10x = 11,539,874.15
  5. Step 5: Solve for x
    x = 11,539,874.15/3,908.10
  6. Step 6: Final answer
    x = 2,952.81

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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.