Home / 3,936.42-5,425.92-2,989.14

Finding the Fourth Proportional to 3,936.42, 5,425.92 and 2,989.14

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Solution

The fourth proportional to 3,936.42, 5,425.92 and 2,989.14 is: 4,120.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.42 : 5,425.92 = 2,989.14 : x
  2. Step 2: Convert to fraction form
    3,936.42/5,425.92 = 2,989.14/x
  3. Step 3: Cross multiply
    3,936.42x = 5,425.92 × 2,989.14
  4. Step 4: Simplify right side
    3,936.42x = 16,218,834.51
  5. Step 5: Solve for x
    x = 16,218,834.51/3,936.42
  6. Step 6: Final answer
    x = 4,120.20

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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.