Home / 3,968.39-5,948.94-2,120.78

Finding the Fourth Proportional to 3,968.39, 5,948.94 and 2,120.78

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Solution

The fourth proportional to 3,968.39, 5,948.94 and 2,120.78 is: 3,179.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,968.39 : 5,948.94 = 2,120.78 : x
  2. Step 2: Convert to fraction form
    3,968.39/5,948.94 = 2,120.78/x
  3. Step 3: Cross multiply
    3,968.39x = 5,948.94 × 2,120.78
  4. Step 4: Simplify right side
    3,968.39x = 12,616,392.97
  5. Step 5: Solve for x
    x = 12,616,392.97/3,968.39
  6. Step 6: Final answer
    x = 3,179.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.