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Finding the Third Proportional to 8,318 and 13,170

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Solution

The third proportional to 8,318 and 13,170 is: 20,852.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318 : 13,170 = 13,170 : x
  2. Step 2: Convert to fraction form
    8,318/13,170 = 13,170/x
  3. Step 3: Cross multiply
    8,318x = 13,170 × 13,170
  4. Step 4: Simplify right side
    8,318x = 173,448,900
  5. Step 5: Solve for x
    x = 173,448,900/8,318
  6. Step 6: Final answer
    x = 20,852.24

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.