Home / 3,936.96-5,431.92-2,740.61

Finding the Fourth Proportional to 3,936.96, 5,431.92 and 2,740.61

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Solution

The fourth proportional to 3,936.96, 5,431.92 and 2,740.61 is: 3,781.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.96 : 5,431.92 = 2,740.61 : x
  2. Step 2: Convert to fraction form
    3,936.96/5,431.92 = 2,740.61/x
  3. Step 3: Cross multiply
    3,936.96x = 5,431.92 × 2,740.61
  4. Step 4: Simplify right side
    3,936.96x = 14,886,770.00
  5. Step 5: Solve for x
    x = 14,886,770.00/3,936.96
  6. Step 6: Final answer
    x = 3,781.28

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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.