Home / 3,930.90-5,424.87-2,162.55

Finding the Fourth Proportional to 3,930.90, 5,424.87 and 2,162.55

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Solution

The fourth proportional to 3,930.90, 5,424.87 and 2,162.55 is: 2,984.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.90 : 5,424.87 = 2,162.55 : x
  2. Step 2: Convert to fraction form
    3,930.90/5,424.87 = 2,162.55/x
  3. Step 3: Cross multiply
    3,930.90x = 5,424.87 × 2,162.55
  4. Step 4: Simplify right side
    3,930.90x = 11,731,552.62
  5. Step 5: Solve for x
    x = 11,731,552.62/3,930.90
  6. Step 6: Final answer
    x = 2,984.44

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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.