Home / 5,186.85-7,781.31-1,489.11

Finding the Fourth Proportional to 5,186.85, 7,781.31 and 1,489.11

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Solution

The fourth proportional to 5,186.85, 7,781.31 and 1,489.11 is: 2,233.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,186.85 : 7,781.31 = 1,489.11 : x
  2. Step 2: Convert to fraction form
    5,186.85/7,781.31 = 1,489.11/x
  3. Step 3: Cross multiply
    5,186.85x = 7,781.31 × 1,489.11
  4. Step 4: Simplify right side
    5,186.85x = 11,587,226.53
  5. Step 5: Solve for x
    x = 11,587,226.53/5,186.85
  6. Step 6: Final answer
    x = 2,233.96

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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.