Home / 3,781.68-5,219.55-2,189.43

Finding the Fourth Proportional to 3,781.68, 5,219.55 and 2,189.43

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Solution

The fourth proportional to 3,781.68, 5,219.55 and 2,189.43 is: 3,021.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.68 : 5,219.55 = 2,189.43 : x
  2. Step 2: Convert to fraction form
    3,781.68/5,219.55 = 2,189.43/x
  3. Step 3: Cross multiply
    3,781.68x = 5,219.55 × 2,189.43
  4. Step 4: Simplify right side
    3,781.68x = 11,427,839.36
  5. Step 5: Solve for x
    x = 11,427,839.36/3,781.68
  6. Step 6: Final answer
    x = 3,021.89

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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.