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Finding the Third Proportional to 13,590 and 21,151

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Solution

The third proportional to 13,590 and 21,151 is: 32,918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590 : 21,151 = 21,151 : x
  2. Step 2: Convert to fraction form
    13,590/21,151 = 21,151/x
  3. Step 3: Cross multiply
    13,590x = 21,151 × 21,151
  4. Step 4: Simplify right side
    13,590x = 447,364,801
  5. Step 5: Solve for x
    x = 447,364,801/13,590
  6. Step 6: Final answer
    x = 32,918.68

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.