Home / 3,929.73-5,422.57-2,161.23

Finding the Fourth Proportional to 3,929.73, 5,422.57 and 2,161.23

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Solution

The fourth proportional to 3,929.73, 5,422.57 and 2,161.23 is: 2,982.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.73 : 5,422.57 = 2,161.23 : x
  2. Step 2: Convert to fraction form
    3,929.73/5,422.57 = 2,161.23/x
  3. Step 3: Cross multiply
    3,929.73x = 5,422.57 × 2,161.23
  4. Step 4: Simplify right side
    3,929.73x = 11,719,420.96
  5. Step 5: Solve for x
    x = 11,719,420.96/3,929.73
  6. Step 6: Final answer
    x = 2,982.25

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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.