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Finding the Third Proportional to 13,608.56 and 20,817.84

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Solution

The third proportional to 13,608.56 and 20,817.84 is: 31,846.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.56 : 20,817.84 = 20,817.84 : x
  2. Step 2: Convert to fraction form
    13,608.56/20,817.84 = 20,817.84/x
  3. Step 3: Cross multiply
    13,608.56x = 20,817.84 × 20,817.84
  4. Step 4: Simplify right side
    13,608.56x = 433,382,618.40
  5. Step 5: Solve for x
    x = 433,382,618.40/13,608.56
  6. Step 6: Final answer
    x = 31,846.32

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.