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Finding the Third Proportional to 11,712 and 13,888

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Solution

The third proportional to 11,712 and 13,888 is: 16,468.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,712 : 13,888 = 13,888 : x
  2. Step 2: Convert to fraction form
    11,712/13,888 = 13,888/x
  3. Step 3: Cross multiply
    11,712x = 13,888 × 13,888
  4. Step 4: Simplify right side
    11,712x = 192,876,544
  5. Step 5: Solve for x
    x = 192,876,544/11,712
  6. Step 6: Final answer
    x = 16,468.28

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Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.