Home / 3,891.26-5,370.04-2,122.86

Finding the Fourth Proportional to 3,891.26, 5,370.04 and 2,122.86

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Solution

The fourth proportional to 3,891.26, 5,370.04 and 2,122.86 is: 2,929.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.26 : 5,370.04 = 2,122.86 : x
  2. Step 2: Convert to fraction form
    3,891.26/5,370.04 = 2,122.86/x
  3. Step 3: Cross multiply
    3,891.26x = 5,370.04 × 2,122.86
  4. Step 4: Simplify right side
    3,891.26x = 11,399,843.11
  5. Step 5: Solve for x
    x = 11,399,843.11/3,891.26
  6. Step 6: Final answer
    x = 2,929.60

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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.