Home / 3,912.12-5,398.68-2,340.21

Finding the Fourth Proportional to 3,912.12, 5,398.68 and 2,340.21

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Solution

The fourth proportional to 3,912.12, 5,398.68 and 2,340.21 is: 3,229.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.12 : 5,398.68 = 2,340.21 : x
  2. Step 2: Convert to fraction form
    3,912.12/5,398.68 = 2,340.21/x
  3. Step 3: Cross multiply
    3,912.12x = 5,398.68 × 2,340.21
  4. Step 4: Simplify right side
    3,912.12x = 12,634,044.92
  5. Step 5: Solve for x
    x = 12,634,044.92/3,912.12
  6. Step 6: Final answer
    x = 3,229.46

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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.