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Finding the Third Proportional to 16,686 and 18,954

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Solution

The third proportional to 16,686 and 18,954 is: 21,530.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,686 : 18,954 = 18,954 : x
  2. Step 2: Convert to fraction form
    16,686/18,954 = 18,954/x
  3. Step 3: Cross multiply
    16,686x = 18,954 × 18,954
  4. Step 4: Simplify right side
    16,686x = 359,254,116
  5. Step 5: Solve for x
    x = 359,254,116/16,686
  6. Step 6: Final answer
    x = 21,530.27

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.