Home / 3,936.40-5,432.21-2,168.00

Finding the Fourth Proportional to 3,936.40, 5,432.21 and 2,168.00

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Solution

The fourth proportional to 3,936.40, 5,432.21 and 2,168.00 is: 2,991.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.40 : 5,432.21 = 2,168.00 : x
  2. Step 2: Convert to fraction form
    3,936.40/5,432.21 = 2,168.00/x
  3. Step 3: Cross multiply
    3,936.40x = 5,432.21 × 2,168.00
  4. Step 4: Simplify right side
    3,936.40x = 11,777,033.97
  5. Step 5: Solve for x
    x = 11,777,033.97/3,936.40
  6. Step 6: Final answer
    x = 2,991.83

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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.