Home / 3,936.12-5,902.42-2,086.80

Finding the Fourth Proportional to 3,936.12, 5,902.42 and 2,086.80

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Solution

The fourth proportional to 3,936.12, 5,902.42 and 2,086.80 is: 3,129.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.12 : 5,902.42 = 2,086.80 : x
  2. Step 2: Convert to fraction form
    3,936.12/5,902.42 = 2,086.80/x
  3. Step 3: Cross multiply
    3,936.12x = 5,902.42 × 2,086.80
  4. Step 4: Simplify right side
    3,936.12x = 12,317,170.06
  5. Step 5: Solve for x
    x = 12,317,170.06/3,936.12
  6. Step 6: Final answer
    x = 3,129.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.