Home / 3,211.72-4,815.45-2,112.75

Finding the Fourth Proportional to 3,211.72, 4,815.45 and 2,112.75

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Solution

The fourth proportional to 3,211.72, 4,815.45 and 2,112.75 is: 3,167.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.72 : 4,815.45 = 2,112.75 : x
  2. Step 2: Convert to fraction form
    3,211.72/4,815.45 = 2,112.75/x
  3. Step 3: Cross multiply
    3,211.72x = 4,815.45 × 2,112.75
  4. Step 4: Simplify right side
    3,211.72x = 10,173,841.99
  5. Step 5: Solve for x
    x = 10,173,841.99/3,211.72
  6. Step 6: Final answer
    x = 3,167.73

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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.