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Finding the Third Proportional to 15,988 and 18,868

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Solution

The third proportional to 15,988 and 18,868 is: 22,266.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,988 : 18,868 = 18,868 : x
  2. Step 2: Convert to fraction form
    15,988/18,868 = 18,868/x
  3. Step 3: Cross multiply
    15,988x = 18,868 × 18,868
  4. Step 4: Simplify right side
    15,988x = 356,001,424
  5. Step 5: Solve for x
    x = 356,001,424/15,988
  6. Step 6: Final answer
    x = 22,266.79

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.