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Finding the Third Proportional to 11,781.50 and 18,219

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Solution

The third proportional to 11,781.50 and 18,219 is: 28,174.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,781.50 : 18,219 = 18,219 : x
  2. Step 2: Convert to fraction form
    11,781.50/18,219 = 18,219/x
  3. Step 3: Cross multiply
    11,781.50x = 18,219 × 18,219
  4. Step 4: Simplify right side
    11,781.50x = 331,931,961
  5. Step 5: Solve for x
    x = 331,931,961/11,781.50
  6. Step 6: Final answer
    x = 28,174.00

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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.