Home / 3,884.20-5,360.21-2,115.84

Finding the Fourth Proportional to 3,884.20, 5,360.21 and 2,115.84

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Solution

The fourth proportional to 3,884.20, 5,360.21 and 2,115.84 is: 2,919.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,884.20 : 5,360.21 = 2,115.84 : x
  2. Step 2: Convert to fraction form
    3,884.20/5,360.21 = 2,115.84/x
  3. Step 3: Cross multiply
    3,884.20x = 5,360.21 × 2,115.84
  4. Step 4: Simplify right side
    3,884.20x = 11,341,346.73
  5. Step 5: Solve for x
    x = 11,341,346.73/3,884.20
  6. Step 6: Final answer
    x = 2,919.87

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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.