Home / 3,929.53-5,422.84-2,161.23

Finding the Fourth Proportional to 3,929.53, 5,422.84 and 2,161.23

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Solution

The fourth proportional to 3,929.53, 5,422.84 and 2,161.23 is: 2,982.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.53 : 5,422.84 = 2,161.23 : x
  2. Step 2: Convert to fraction form
    3,929.53/5,422.84 = 2,161.23/x
  3. Step 3: Cross multiply
    3,929.53x = 5,422.84 × 2,161.23
  4. Step 4: Simplify right side
    3,929.53x = 11,720,004.49
  5. Step 5: Solve for x
    x = 11,720,004.49/3,929.53
  6. Step 6: Final answer
    x = 2,982.55

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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.