Home / 3,936.30-5,431.85-2,167.91

Finding the Fourth Proportional to 3,936.30, 5,431.85 and 2,167.91

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Solution

The fourth proportional to 3,936.30, 5,431.85 and 2,167.91 is: 2,991.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.30 : 5,431.85 = 2,167.91 : x
  2. Step 2: Convert to fraction form
    3,936.30/5,431.85 = 2,167.91/x
  3. Step 3: Cross multiply
    3,936.30x = 5,431.85 × 2,167.91
  4. Step 4: Simplify right side
    3,936.30x = 11,775,737.16
  5. Step 5: Solve for x
    x = 11,775,737.16/3,936.30
  6. Step 6: Final answer
    x = 2,991.57

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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.