Home / 2,116.90-3,174.39-1,375.78

Finding the Fourth Proportional to 2,116.90, 3,174.39 and 1,375.78

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Solution

The fourth proportional to 2,116.90, 3,174.39 and 1,375.78 is: 2,063.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.90 : 3,174.39 = 1,375.78 : x
  2. Step 2: Convert to fraction form
    2,116.90/3,174.39 = 1,375.78/x
  3. Step 3: Cross multiply
    2,116.90x = 3,174.39 × 1,375.78
  4. Step 4: Simplify right side
    2,116.90x = 4,367,262.27
  5. Step 5: Solve for x
    x = 4,367,262.27/2,116.90
  6. Step 6: Final answer
    x = 2,063.05

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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.