Home / 3,929.87-5,423.52-2,251.80

Finding the Fourth Proportional to 3,929.87, 5,423.52 and 2,251.80

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Solution

The fourth proportional to 3,929.87, 5,423.52 and 2,251.80 is: 3,107.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.87 : 5,423.52 = 2,251.80 : x
  2. Step 2: Convert to fraction form
    3,929.87/5,423.52 = 2,251.80/x
  3. Step 3: Cross multiply
    3,929.87x = 5,423.52 × 2,251.80
  4. Step 4: Simplify right side
    3,929.87x = 12,212,682.34
  5. Step 5: Solve for x
    x = 12,212,682.34/3,929.87
  6. Step 6: Final answer
    x = 3,107.66

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1.5x scale

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.