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Finding the Third Proportional to 7,218 and 17,775

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Solution

The third proportional to 7,218 and 17,775 is: 43,772.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218 : 17,775 = 17,775 : x
  2. Step 2: Convert to fraction form
    7,218/17,775 = 17,775/x
  3. Step 3: Cross multiply
    7,218x = 17,775 × 17,775
  4. Step 4: Simplify right side
    7,218x = 315,950,625
  5. Step 5: Solve for x
    x = 315,950,625/7,218
  6. Step 6: Final answer
    x = 43,772.60

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Why These Related Problems?

These problems maintain the same ratio (2.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.