Home / 3,876.68-5,815.26-2,119.40

Finding the Fourth Proportional to 3,876.68, 5,815.26 and 2,119.40

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Solution

The fourth proportional to 3,876.68, 5,815.26 and 2,119.40 is: 3,179.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.68 : 5,815.26 = 2,119.40 : x
  2. Step 2: Convert to fraction form
    3,876.68/5,815.26 = 2,119.40/x
  3. Step 3: Cross multiply
    3,876.68x = 5,815.26 × 2,119.40
  4. Step 4: Simplify right side
    3,876.68x = 12,324,862.04
  5. Step 5: Solve for x
    x = 12,324,862.04/3,876.68
  6. Step 6: Final answer
    x = 3,179.23

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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.