Home / 3,884.12-5,360.05-2,115.72

Finding the Fourth Proportional to 3,884.12, 5,360.05 and 2,115.72

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Solution

The fourth proportional to 3,884.12, 5,360.05 and 2,115.72 is: 2,919.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,884.12 : 5,360.05 = 2,115.72 : x
  2. Step 2: Convert to fraction form
    3,884.12/5,360.05 = 2,115.72/x
  3. Step 3: Cross multiply
    3,884.12x = 5,360.05 × 2,115.72
  4. Step 4: Simplify right side
    3,884.12x = 11,340,378.14
  5. Step 5: Solve for x
    x = 11,340,378.14/3,884.12
  6. Step 6: Final answer
    x = 2,919.68

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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.