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Finding the Third Proportional to 28,116 and 39,330

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Solution

The third proportional to 28,116 and 39,330 is: 55,016.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,116 : 39,330 = 39,330 : x
  2. Step 2: Convert to fraction form
    28,116/39,330 = 39,330/x
  3. Step 3: Cross multiply
    28,116x = 39,330 × 39,330
  4. Step 4: Simplify right side
    28,116x = 1,546,848,900
  5. Step 5: Solve for x
    x = 1,546,848,900/28,116
  6. Step 6: Final answer
    x = 55,016.68

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.