Home / 3,930.29-5,423.70-2,229.11

Finding the Fourth Proportional to 3,930.29, 5,423.70 and 2,229.11

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Solution

The fourth proportional to 3,930.29, 5,423.70 and 2,229.11 is: 3,076.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.29 : 5,423.70 = 2,229.11 : x
  2. Step 2: Convert to fraction form
    3,930.29/5,423.70 = 2,229.11/x
  3. Step 3: Cross multiply
    3,930.29x = 5,423.70 × 2,229.11
  4. Step 4: Simplify right side
    3,930.29x = 12,089,985.64
  5. Step 5: Solve for x
    x = 12,089,985.64/3,930.29
  6. Step 6: Final answer
    x = 3,076.11

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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.