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Finding the Third Proportional to 8,178.19 and 12,971.25

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Solution

The third proportional to 8,178.19 and 12,971.25 is: 20,573.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.19 : 12,971.25 = 12,971.25 : x
  2. Step 2: Convert to fraction form
    8,178.19/12,971.25 = 12,971.25/x
  3. Step 3: Cross multiply
    8,178.19x = 12,971.25 × 12,971.25
  4. Step 4: Simplify right side
    8,178.19x = 168,253,326.56
  5. Step 5: Solve for x
    x = 168,253,326.56/8,178.19
  6. Step 6: Final answer
    x = 20,573.42

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.