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Finding the Third Proportional to 12,988 and 16,888

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Solution

The third proportional to 12,988 and 16,888 is: 21,959.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988 : 16,888 = 16,888 : x
  2. Step 2: Convert to fraction form
    12,988/16,888 = 16,888/x
  3. Step 3: Cross multiply
    12,988x = 16,888 × 16,888
  4. Step 4: Simplify right side
    12,988x = 285,204,544
  5. Step 5: Solve for x
    x = 285,204,544/12,988
  6. Step 6: Final answer
    x = 21,959.08

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.