Home / 3,936.54-5,431.86-2,168.26

Finding the Fourth Proportional to 3,936.54, 5,431.86 and 2,168.26

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Solution

The fourth proportional to 3,936.54, 5,431.86 and 2,168.26 is: 2,991.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.54 : 5,431.86 = 2,168.26 : x
  2. Step 2: Convert to fraction form
    3,936.54/5,431.86 = 2,168.26/x
  3. Step 3: Cross multiply
    3,936.54x = 5,431.86 × 2,168.26
  4. Step 4: Simplify right side
    3,936.54x = 11,777,657.60
  5. Step 5: Solve for x
    x = 11,777,657.60/3,936.54
  6. Step 6: Final answer
    x = 2,991.88

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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.