Home / 2,515.38-3,761.70-2,172.78

Finding the Fourth Proportional to 2,515.38, 3,761.70 and 2,172.78

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Solution

The fourth proportional to 2,515.38, 3,761.70 and 2,172.78 is: 3,249.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,515.38 : 3,761.70 = 2,172.78 : x
  2. Step 2: Convert to fraction form
    2,515.38/3,761.70 = 2,172.78/x
  3. Step 3: Cross multiply
    2,515.38x = 3,761.70 × 2,172.78
  4. Step 4: Simplify right side
    2,515.38x = 8,173,346.53
  5. Step 5: Solve for x
    x = 8,173,346.53/2,515.38
  6. Step 6: Final answer
    x = 3,249.35

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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.