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Finding the Third Proportional to 10,215 and 20,011.50

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Solution

The third proportional to 10,215 and 20,011.50 is: 39,203.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,215 : 20,011.50 = 20,011.50 : x
  2. Step 2: Convert to fraction form
    10,215/20,011.50 = 20,011.50/x
  3. Step 3: Cross multiply
    10,215x = 20,011.50 × 20,011.50
  4. Step 4: Simplify right side
    10,215x = 400,460,132.25
  5. Step 5: Solve for x
    x = 400,460,132.25/10,215
  6. Step 6: Final answer
    x = 39,203.15

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Why These Related Problems?

These problems maintain the same ratio (1.96) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.