Home / 3,986.12-5,500.82-2,217.72

Finding the Fourth Proportional to 3,986.12, 5,500.82 and 2,217.72

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Solution

The fourth proportional to 3,986.12, 5,500.82 and 2,217.72 is: 3,060.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.12 : 5,500.82 = 2,217.72 : x
  2. Step 2: Convert to fraction form
    3,986.12/5,500.82 = 2,217.72/x
  3. Step 3: Cross multiply
    3,986.12x = 5,500.82 × 2,217.72
  4. Step 4: Simplify right side
    3,986.12x = 12,199,278.53
  5. Step 5: Solve for x
    x = 12,199,278.53/3,986.12
  6. Step 6: Final answer
    x = 3,060.44

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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.