Home / 13,851.68-20,781.23-3,991.82

Finding the Fourth Proportional to 13,851.68, 20,781.23 and 3,991.82

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Solution

The fourth proportional to 13,851.68, 20,781.23 and 3,991.82 is: 5,988.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,851.68 : 20,781.23 = 3,991.82 : x
  2. Step 2: Convert to fraction form
    13,851.68/20,781.23 = 3,991.82/x
  3. Step 3: Cross multiply
    13,851.68x = 20,781.23 × 3,991.82
  4. Step 4: Simplify right side
    13,851.68x = 82,954,805.67
  5. Step 5: Solve for x
    x = 82,954,805.67/13,851.68
  6. Step 6: Final answer
    x = 5,988.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.