Home / 3,981.12-5,493.68-2,188.56

Finding the Fourth Proportional to 3,981.12, 5,493.68 and 2,188.56

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Solution

The fourth proportional to 3,981.12, 5,493.68 and 2,188.56 is: 3,020.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.12 : 5,493.68 = 2,188.56 : x
  2. Step 2: Convert to fraction form
    3,981.12/5,493.68 = 2,188.56/x
  3. Step 3: Cross multiply
    3,981.12x = 5,493.68 × 2,188.56
  4. Step 4: Simplify right side
    3,981.12x = 12,023,248.30
  5. Step 5: Solve for x
    x = 12,023,248.30/3,981.12
  6. Step 6: Final answer
    x = 3,020.07

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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.