Home / 2,781.68-3,836.90-1,661.75

Finding the Fourth Proportional to 2,781.68, 3,836.90 and 1,661.75

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Solution

The fourth proportional to 2,781.68, 3,836.90 and 1,661.75 is: 2,292.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.68 : 3,836.90 = 1,661.75 : x
  2. Step 2: Convert to fraction form
    2,781.68/3,836.90 = 1,661.75/x
  3. Step 3: Cross multiply
    2,781.68x = 3,836.90 × 1,661.75
  4. Step 4: Simplify right side
    2,781.68x = 6,375,968.58
  5. Step 5: Solve for x
    x = 6,375,968.58/2,781.68
  6. Step 6: Final answer
    x = 2,292.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.