Home / 3,936.21-5,431.94-2,167.80

Finding the Fourth Proportional to 3,936.21, 5,431.94 and 2,167.80

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Solution

The fourth proportional to 3,936.21, 5,431.94 and 2,167.80 is: 2,991.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.21 : 5,431.94 = 2,167.80 : x
  2. Step 2: Convert to fraction form
    3,936.21/5,431.94 = 2,167.80/x
  3. Step 3: Cross multiply
    3,936.21x = 5,431.94 × 2,167.80
  4. Step 4: Simplify right side
    3,936.21x = 11,775,348.69
  5. Step 5: Solve for x
    x = 11,775,348.69/3,936.21
  6. Step 6: Final answer
    x = 2,991.55

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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.