Home / 3,930.89-5,425.95-2,439.68

Finding the Fourth Proportional to 3,930.89, 5,425.95 and 2,439.68

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Solution

The fourth proportional to 3,930.89, 5,425.95 and 2,439.68 is: 3,367.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.89 : 5,425.95 = 2,439.68 : x
  2. Step 2: Convert to fraction form
    3,930.89/5,425.95 = 2,439.68/x
  3. Step 3: Cross multiply
    3,930.89x = 5,425.95 × 2,439.68
  4. Step 4: Simplify right side
    3,930.89x = 13,237,563.72
  5. Step 5: Solve for x
    x = 13,237,563.72/3,930.89
  6. Step 6: Final answer
    x = 3,367.58

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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.