Home / 3,900.28-5,382.23-2,131.95

Finding the Fourth Proportional to 3,900.28, 5,382.23 and 2,131.95

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Solution

The fourth proportional to 3,900.28, 5,382.23 and 2,131.95 is: 2,942.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.28 : 5,382.23 = 2,131.95 : x
  2. Step 2: Convert to fraction form
    3,900.28/5,382.23 = 2,131.95/x
  3. Step 3: Cross multiply
    3,900.28x = 5,382.23 × 2,131.95
  4. Step 4: Simplify right side
    3,900.28x = 11,474,645.25
  5. Step 5: Solve for x
    x = 11,474,645.25/3,900.28
  6. Step 6: Final answer
    x = 2,942.01

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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.