Home / 3,936.06-5,431.92-2,167.80

Finding the Fourth Proportional to 3,936.06, 5,431.92 and 2,167.80

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Solution

The fourth proportional to 3,936.06, 5,431.92 and 2,167.80 is: 2,991.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.06 : 5,431.92 = 2,167.80 : x
  2. Step 2: Convert to fraction form
    3,936.06/5,431.92 = 2,167.80/x
  3. Step 3: Cross multiply
    3,936.06x = 5,431.92 × 2,167.80
  4. Step 4: Simplify right side
    3,936.06x = 11,775,316.18
  5. Step 5: Solve for x
    x = 11,775,316.18/3,936.06
  6. Step 6: Final answer
    x = 2,991.65

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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.