Home / 3,930.26-5,423.79-2,161.88

Finding the Fourth Proportional to 3,930.26, 5,423.79 and 2,161.88

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Solution

The fourth proportional to 3,930.26, 5,423.79 and 2,161.88 is: 2,983.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.26 : 5,423.79 = 2,161.88 : x
  2. Step 2: Convert to fraction form
    3,930.26/5,423.79 = 2,161.88/x
  3. Step 3: Cross multiply
    3,930.26x = 5,423.79 × 2,161.88
  4. Step 4: Simplify right side
    3,930.26x = 11,725,556.01
  5. Step 5: Solve for x
    x = 11,725,556.01/3,930.26
  6. Step 6: Final answer
    x = 2,983.41

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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.