Home / 3,929.36-5,420.97-2,249.86

Finding the Fourth Proportional to 3,929.36, 5,420.97 and 2,249.86

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Solution

The fourth proportional to 3,929.36, 5,420.97 and 2,249.86 is: 3,103.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.36 : 5,420.97 = 2,249.86 : x
  2. Step 2: Convert to fraction form
    3,929.36/5,420.97 = 2,249.86/x
  3. Step 3: Cross multiply
    3,929.36x = 5,420.97 × 2,249.86
  4. Step 4: Simplify right side
    3,929.36x = 12,196,423.56
  5. Step 5: Solve for x
    x = 12,196,423.56/3,929.36
  6. Step 6: Final answer
    x = 3,103.92

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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.