Home / 3,930.09-5,423.43-2,137.55

Finding the Fourth Proportional to 3,930.09, 5,423.43 and 2,137.55

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Solution

The fourth proportional to 3,930.09, 5,423.43 and 2,137.55 is: 2,949.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.09 : 5,423.43 = 2,137.55 : x
  2. Step 2: Convert to fraction form
    3,930.09/5,423.43 = 2,137.55/x
  3. Step 3: Cross multiply
    3,930.09x = 5,423.43 × 2,137.55
  4. Step 4: Simplify right side
    3,930.09x = 11,592,825.68
  5. Step 5: Solve for x
    x = 11,592,825.68/3,930.09
  6. Step 6: Final answer
    x = 2,949.76

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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.