Home / 3,211.78-4,820.10-2,115.76

Finding the Fourth Proportional to 3,211.78, 4,820.10 and 2,115.76

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Solution

The fourth proportional to 3,211.78, 4,820.10 and 2,115.76 is: 3,175.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.78 : 4,820.10 = 2,115.76 : x
  2. Step 2: Convert to fraction form
    3,211.78/4,820.10 = 2,115.76/x
  3. Step 3: Cross multiply
    3,211.78x = 4,820.10 × 2,115.76
  4. Step 4: Simplify right side
    3,211.78x = 10,198,174.78
  5. Step 5: Solve for x
    x = 10,198,174.78/3,211.78
  6. Step 6: Final answer
    x = 3,175.24

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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.