Home / 3,900.92-5,383.12-2,132.55

Finding the Fourth Proportional to 3,900.92, 5,383.12 and 2,132.55

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Solution

The fourth proportional to 3,900.92, 5,383.12 and 2,132.55 is: 2,942.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.92 : 5,383.12 = 2,132.55 : x
  2. Step 2: Convert to fraction form
    3,900.92/5,383.12 = 2,132.55/x
  3. Step 3: Cross multiply
    3,900.92x = 5,383.12 × 2,132.55
  4. Step 4: Simplify right side
    3,900.92x = 11,479,772.56
  5. Step 5: Solve for x
    x = 11,479,772.56/3,900.92
  6. Step 6: Final answer
    x = 2,942.84

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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.