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Finding the Third Proportional to 5,218 and 7,975

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Solution

The third proportional to 5,218 and 7,975 is: 12,188.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218 : 7,975 = 7,975 : x
  2. Step 2: Convert to fraction form
    5,218/7,975 = 7,975/x
  3. Step 3: Cross multiply
    5,218x = 7,975 × 7,975
  4. Step 4: Simplify right side
    5,218x = 63,600,625
  5. Step 5: Solve for x
    x = 63,600,625/5,218
  6. Step 6: Final answer
    x = 12,188.70

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.