Home / 3,929.31-5,423.40-2,251.71

Finding the Fourth Proportional to 3,929.31, 5,423.40 and 2,251.71

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Solution

The fourth proportional to 3,929.31, 5,423.40 and 2,251.71 is: 3,107.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.31 : 5,423.40 = 2,251.71 : x
  2. Step 2: Convert to fraction form
    3,929.31/5,423.40 = 2,251.71/x
  3. Step 3: Cross multiply
    3,929.31x = 5,423.40 × 2,251.71
  4. Step 4: Simplify right side
    3,929.31x = 12,211,924.01
  5. Step 5: Solve for x
    x = 12,211,924.01/3,929.31
  6. Step 6: Final answer
    x = 3,107.91

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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.