Home / 3,912.40-5,398.99-2,143.95

Finding the Fourth Proportional to 3,912.40, 5,398.99 and 2,143.95

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Solution

The fourth proportional to 3,912.40, 5,398.99 and 2,143.95 is: 2,958.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.40 : 5,398.99 = 2,143.95 : x
  2. Step 2: Convert to fraction form
    3,912.40/5,398.99 = 2,143.95/x
  3. Step 3: Cross multiply
    3,912.40x = 5,398.99 × 2,143.95
  4. Step 4: Simplify right side
    3,912.40x = 11,575,164.61
  5. Step 5: Solve for x
    x = 11,575,164.61/3,912.40
  6. Step 6: Final answer
    x = 2,958.58

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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.