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Finding the Third Proportional to 11,821.50 and 13,887

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Solution

The third proportional to 11,821.50 and 13,887 is: 16,313.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,821.50 : 13,887 = 13,887 : x
  2. Step 2: Convert to fraction form
    11,821.50/13,887 = 13,887/x
  3. Step 3: Cross multiply
    11,821.50x = 13,887 × 13,887
  4. Step 4: Simplify right side
    11,821.50x = 192,848,769
  5. Step 5: Solve for x
    x = 192,848,769/11,821.50
  6. Step 6: Final answer
    x = 16,313.39

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.