Home / 3,211.76-4,815.54-2,112.78

Finding the Fourth Proportional to 3,211.76, 4,815.54 and 2,112.78

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Solution

The fourth proportional to 3,211.76, 4,815.54 and 2,112.78 is: 3,167.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.76 : 4,815.54 = 2,112.78 : x
  2. Step 2: Convert to fraction form
    3,211.76/4,815.54 = 2,112.78/x
  3. Step 3: Cross multiply
    3,211.76x = 4,815.54 × 2,112.78
  4. Step 4: Simplify right side
    3,211.76x = 10,174,176.60
  5. Step 5: Solve for x
    x = 10,174,176.60/3,211.76
  6. Step 6: Final answer
    x = 3,167.79

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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.