Home / 2,781.34-3,837.68-1,661.85

Finding the Fourth Proportional to 2,781.34, 3,837.68 and 1,661.85

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Solution

The fourth proportional to 2,781.34, 3,837.68 and 1,661.85 is: 2,293.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.34 : 3,837.68 = 1,661.85 : x
  2. Step 2: Convert to fraction form
    2,781.34/3,837.68 = 1,661.85/x
  3. Step 3: Cross multiply
    2,781.34x = 3,837.68 × 1,661.85
  4. Step 4: Simplify right side
    2,781.34x = 6,377,646.43
  5. Step 5: Solve for x
    x = 6,377,646.43/2,781.34
  6. Step 6: Final answer
    x = 2,293.01

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1.5x scale

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.