Home / 3,912.12-5,398.64-2,143.69

Finding the Fourth Proportional to 3,912.12, 5,398.64 and 2,143.69

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Solution

The fourth proportional to 3,912.12, 5,398.64 and 2,143.69 is: 2,958.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.12 : 5,398.64 = 2,143.69 : x
  2. Step 2: Convert to fraction form
    3,912.12/5,398.64 = 2,143.69/x
  3. Step 3: Cross multiply
    3,912.12x = 5,398.64 × 2,143.69
  4. Step 4: Simplify right side
    3,912.12x = 11,572,972.87
  5. Step 5: Solve for x
    x = 11,572,972.87/3,912.12
  6. Step 6: Final answer
    x = 2,958.24

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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.