Home / 3,930.39-5,425.65-2,986.34

Finding the Fourth Proportional to 3,930.39, 5,425.65 and 2,986.34

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Solution

The fourth proportional to 3,930.39, 5,425.65 and 2,986.34 is: 4,122.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.39 : 5,425.65 = 2,986.34 : x
  2. Step 2: Convert to fraction form
    3,930.39/5,425.65 = 2,986.34/x
  3. Step 3: Cross multiply
    3,930.39x = 5,425.65 × 2,986.34
  4. Step 4: Simplify right side
    3,930.39x = 16,202,808.49
  5. Step 5: Solve for x
    x = 16,202,808.49/3,930.39
  6. Step 6: Final answer
    x = 4,122.44

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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.