Home / 3,900.30-5,382.45-2,132.02

Finding the Fourth Proportional to 3,900.30, 5,382.45 and 2,132.02

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Solution

The fourth proportional to 3,900.30, 5,382.45 and 2,132.02 is: 2,942.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.30 : 5,382.45 = 2,132.02 : x
  2. Step 2: Convert to fraction form
    3,900.30/5,382.45 = 2,132.02/x
  3. Step 3: Cross multiply
    3,900.30x = 5,382.45 × 2,132.02
  4. Step 4: Simplify right side
    3,900.30x = 11,475,497.78
  5. Step 5: Solve for x
    x = 11,475,497.78/3,900.30
  6. Step 6: Final answer
    x = 2,942.21

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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.