Home / 2,121.73-3,169.64-1,689.37

Finding the Fourth Proportional to 2,121.73, 3,169.64 and 1,689.37

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Solution

The fourth proportional to 2,121.73, 3,169.64 and 1,689.37 is: 2,523.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.73 : 3,169.64 = 1,689.37 : x
  2. Step 2: Convert to fraction form
    2,121.73/3,169.64 = 1,689.37/x
  3. Step 3: Cross multiply
    2,121.73x = 3,169.64 × 1,689.37
  4. Step 4: Simplify right side
    2,121.73x = 5,354,694.73
  5. Step 5: Solve for x
    x = 5,354,694.73/2,121.73
  6. Step 6: Final answer
    x = 2,523.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.