Home / 3,929.69-5,422.52-2,251.02

Finding the Fourth Proportional to 3,929.69, 5,422.52 and 2,251.02

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Solution

The fourth proportional to 3,929.69, 5,422.52 and 2,251.02 is: 3,106.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.69 : 5,422.52 = 2,251.02 : x
  2. Step 2: Convert to fraction form
    3,929.69/5,422.52 = 2,251.02/x
  3. Step 3: Cross multiply
    3,929.69x = 5,422.52 × 2,251.02
  4. Step 4: Simplify right side
    3,929.69x = 12,206,174.85
  5. Step 5: Solve for x
    x = 12,206,174.85/3,929.69
  6. Step 6: Final answer
    x = 3,106.14

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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.