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Finding the Third Proportional to 13,998 and 21,009

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Solution

The third proportional to 13,998 and 21,009 is: 31,531.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998 : 21,009 = 21,009 : x
  2. Step 2: Convert to fraction form
    13,998/21,009 = 21,009/x
  3. Step 3: Cross multiply
    13,998x = 21,009 × 21,009
  4. Step 4: Simplify right side
    13,998x = 441,378,081
  5. Step 5: Solve for x
    x = 441,378,081/13,998
  6. Step 6: Final answer
    x = 31,531.51

Related Problems

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.