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Finding the Third Proportional to 7,140 and 13,218

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Solution

The third proportional to 7,140 and 13,218 is: 24,469.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140 : 13,218 = 13,218 : x
  2. Step 2: Convert to fraction form
    7,140/13,218 = 13,218/x
  3. Step 3: Cross multiply
    7,140x = 13,218 × 13,218
  4. Step 4: Simplify right side
    7,140x = 174,715,524
  5. Step 5: Solve for x
    x = 174,715,524/7,140
  6. Step 6: Final answer
    x = 24,469.96

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.