Home / 3,900.62-5,382.24-2,221.09

Finding the Fourth Proportional to 3,900.62, 5,382.24 and 2,221.09

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Solution

The fourth proportional to 3,900.62, 5,382.24 and 2,221.09 is: 3,064.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.62 : 5,382.24 = 2,221.09 : x
  2. Step 2: Convert to fraction form
    3,900.62/5,382.24 = 2,221.09/x
  3. Step 3: Cross multiply
    3,900.62x = 5,382.24 × 2,221.09
  4. Step 4: Simplify right side
    3,900.62x = 11,954,439.44
  5. Step 5: Solve for x
    x = 11,954,439.44/3,900.62
  6. Step 6: Final answer
    x = 3,064.75

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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.