Home / 2,081.17-3,121.62-1,107.82

Finding the Fourth Proportional to 2,081.17, 3,121.62 and 1,107.82

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Solution

The fourth proportional to 2,081.17, 3,121.62 and 1,107.82 is: 1,661.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.17 : 3,121.62 = 1,107.82 : x
  2. Step 2: Convert to fraction form
    2,081.17/3,121.62 = 1,107.82/x
  3. Step 3: Cross multiply
    2,081.17x = 3,121.62 × 1,107.82
  4. Step 4: Simplify right side
    2,081.17x = 3,458,193.07
  5. Step 5: Solve for x
    x = 3,458,193.07/2,081.17
  6. Step 6: Final answer
    x = 1,661.66

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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.