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Finding the Third Proportional to 16,768 and 18,240

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Solution

The third proportional to 16,768 and 18,240 is: 19,841.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,768 : 18,240 = 18,240 : x
  2. Step 2: Convert to fraction form
    16,768/18,240 = 18,240/x
  3. Step 3: Cross multiply
    16,768x = 18,240 × 18,240
  4. Step 4: Simplify right side
    16,768x = 332,697,600
  5. Step 5: Solve for x
    x = 332,697,600/16,768
  6. Step 6: Final answer
    x = 19,841.22

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.