Home / 3,781.82-5,218.65-2,103.09

Finding the Fourth Proportional to 3,781.82, 5,218.65 and 2,103.09

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Solution

The fourth proportional to 3,781.82, 5,218.65 and 2,103.09 is: 2,902.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.82 : 5,218.65 = 2,103.09 : x
  2. Step 2: Convert to fraction form
    3,781.82/5,218.65 = 2,103.09/x
  3. Step 3: Cross multiply
    3,781.82x = 5,218.65 × 2,103.09
  4. Step 4: Simplify right side
    3,781.82x = 10,975,290.63
  5. Step 5: Solve for x
    x = 10,975,290.63/3,781.82
  6. Step 6: Final answer
    x = 2,902.12

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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.