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Finding the Third Proportional to 13,626 and 21,411

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Solution

The third proportional to 13,626 and 21,411 is: 33,643.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,626 : 21,411 = 21,411 : x
  2. Step 2: Convert to fraction form
    13,626/21,411 = 21,411/x
  3. Step 3: Cross multiply
    13,626x = 21,411 × 21,411
  4. Step 4: Simplify right side
    13,626x = 458,430,921
  5. Step 5: Solve for x
    x = 458,430,921/13,626
  6. Step 6: Final answer
    x = 33,643.84

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.