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Finding the Third Proportional to 17,421.75 and 20,175.75

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Solution

The third proportional to 17,421.75 and 20,175.75 is: 23,365.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,421.75 : 20,175.75 = 20,175.75 : x
  2. Step 2: Convert to fraction form
    17,421.75/20,175.75 = 20,175.75/x
  3. Step 3: Cross multiply
    17,421.75x = 20,175.75 × 20,175.75
  4. Step 4: Simplify right side
    17,421.75x = 407,060,888.06
  5. Step 5: Solve for x
    x = 407,060,888.06/17,421.75
  6. Step 6: Final answer
    x = 23,365.10

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.