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Finding the Third Proportional to 20,405 and 30,667.50

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Solution

The third proportional to 20,405 and 30,667.50 is: 46,091.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405 : 30,667.50 = 30,667.50 : x
  2. Step 2: Convert to fraction form
    20,405/30,667.50 = 30,667.50/x
  3. Step 3: Cross multiply
    20,405x = 30,667.50 × 30,667.50
  4. Step 4: Simplify right side
    20,405x = 940,495,556.25
  5. Step 5: Solve for x
    x = 940,495,556.25/20,405
  6. Step 6: Final answer
    x = 46,091.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.