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Finding the Third Proportional to 17,577 and 20,515.50

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Solution

The third proportional to 17,577 and 20,515.50 is: 23,945.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,577 : 20,515.50 = 20,515.50 : x
  2. Step 2: Convert to fraction form
    17,577/20,515.50 = 20,515.50/x
  3. Step 3: Cross multiply
    17,577x = 20,515.50 × 20,515.50
  4. Step 4: Simplify right side
    17,577x = 420,885,740.25
  5. Step 5: Solve for x
    x = 420,885,740.25/17,577
  6. Step 6: Final answer
    x = 23,945.25

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.