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Finding the Third Proportional to 8,639.25 and 18,903

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Solution

The third proportional to 8,639.25 and 18,903 is: 41,360.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.25 : 18,903 = 18,903 : x
  2. Step 2: Convert to fraction form
    8,639.25/18,903 = 18,903/x
  3. Step 3: Cross multiply
    8,639.25x = 18,903 × 18,903
  4. Step 4: Simplify right side
    8,639.25x = 357,323,409
  5. Step 5: Solve for x
    x = 357,323,409/8,639.25
  6. Step 6: Final answer
    x = 41,360.47

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.