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Finding the Third Proportional to 8,472 and 18,159

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Solution

The third proportional to 8,472 and 18,159 is: 38,922.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472 : 18,159 = 18,159 : x
  2. Step 2: Convert to fraction form
    8,472/18,159 = 18,159/x
  3. Step 3: Cross multiply
    8,472x = 18,159 × 18,159
  4. Step 4: Simplify right side
    8,472x = 329,749,281
  5. Step 5: Solve for x
    x = 329,749,281/8,472
  6. Step 6: Final answer
    x = 38,922.25

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.