Home / 2,143.72-3,229.99-1,938.52

Finding the Fourth Proportional to 2,143.72, 3,229.99 and 1,938.52

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Solution

The fourth proportional to 2,143.72, 3,229.99 and 1,938.52 is: 2,920.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.72 : 3,229.99 = 1,938.52 : x
  2. Step 2: Convert to fraction form
    2,143.72/3,229.99 = 1,938.52/x
  3. Step 3: Cross multiply
    2,143.72x = 3,229.99 × 1,938.52
  4. Step 4: Simplify right side
    2,143.72x = 6,261,400.21
  5. Step 5: Solve for x
    x = 6,261,400.21/2,143.72
  6. Step 6: Final answer
    x = 2,920.81

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.