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Finding the Third Proportional to 20,428.50 and 30,765

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Solution

The third proportional to 20,428.50 and 30,765 is: 46,331.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.50 : 30,765 = 30,765 : x
  2. Step 2: Convert to fraction form
    20,428.50/30,765 = 30,765/x
  3. Step 3: Cross multiply
    20,428.50x = 30,765 × 30,765
  4. Step 4: Simplify right side
    20,428.50x = 946,485,225
  5. Step 5: Solve for x
    x = 946,485,225/20,428.50
  6. Step 6: Final answer
    x = 46,331.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.