Home / 3,929.96-5,423.38-2,161.56

Finding the Fourth Proportional to 3,929.96, 5,423.38 and 2,161.56

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Solution

The fourth proportional to 3,929.96, 5,423.38 and 2,161.56 is: 2,982.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.96 : 5,423.38 = 2,161.56 : x
  2. Step 2: Convert to fraction form
    3,929.96/5,423.38 = 2,161.56/x
  3. Step 3: Cross multiply
    3,929.96x = 5,423.38 × 2,161.56
  4. Step 4: Simplify right side
    3,929.96x = 11,722,961.27
  5. Step 5: Solve for x
    x = 11,722,961.27/3,929.96
  6. Step 6: Final answer
    x = 2,982.97

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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.