Home / 3,929.83-5,423.26-2,161.48

Finding the Fourth Proportional to 3,929.83, 5,423.26 and 2,161.48

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Solution

The fourth proportional to 3,929.83, 5,423.26 and 2,161.48 is: 2,982.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.83 : 5,423.26 = 2,161.48 : x
  2. Step 2: Convert to fraction form
    3,929.83/5,423.26 = 2,161.48/x
  3. Step 3: Cross multiply
    3,929.83x = 5,423.26 × 2,161.48
  4. Step 4: Simplify right side
    3,929.83x = 11,722,249.06
  5. Step 5: Solve for x
    x = 11,722,249.06/3,929.83
  6. Step 6: Final answer
    x = 2,982.89

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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.