Home / 3,932.12-5,426.38-2,163.90

Finding the Fourth Proportional to 3,932.12, 5,426.38 and 2,163.90

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Solution

The fourth proportional to 3,932.12, 5,426.38 and 2,163.90 is: 2,986.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,932.12 : 5,426.38 = 2,163.90 : x
  2. Step 2: Convert to fraction form
    3,932.12/5,426.38 = 2,163.90/x
  3. Step 3: Cross multiply
    3,932.12x = 5,426.38 × 2,163.90
  4. Step 4: Simplify right side
    3,932.12x = 11,742,143.68
  5. Step 5: Solve for x
    x = 11,742,143.68/3,932.12
  6. Step 6: Final answer
    x = 2,986.21

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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.