Home / 2,781.34-4,185.96-2,091.58

Finding the Fourth Proportional to 2,781.34, 4,185.96 and 2,091.58

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Solution

The fourth proportional to 2,781.34, 4,185.96 and 2,091.58 is: 3,147.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.34 : 4,185.96 = 2,091.58 : x
  2. Step 2: Convert to fraction form
    2,781.34/4,185.96 = 2,091.58/x
  3. Step 3: Cross multiply
    2,781.34x = 4,185.96 × 2,091.58
  4. Step 4: Simplify right side
    2,781.34x = 8,755,270.22
  5. Step 5: Solve for x
    x = 8,755,270.22/2,781.34
  6. Step 6: Final answer
    x = 3,147.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.