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Finding the Third Proportional to 5,178 and 8,019

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Solution

The third proportional to 5,178 and 8,019 is: 12,418.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178 : 8,019 = 8,019 : x
  2. Step 2: Convert to fraction form
    5,178/8,019 = 8,019/x
  3. Step 3: Cross multiply
    5,178x = 8,019 × 8,019
  4. Step 4: Simplify right side
    5,178x = 64,304,361
  5. Step 5: Solve for x
    x = 64,304,361/5,178
  6. Step 6: Final answer
    x = 12,418.76

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.