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Finding the Third Proportional to 12,561.75 and 15,207.75

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Solution

The third proportional to 12,561.75 and 15,207.75 is: 18,411.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.75 : 15,207.75 = 15,207.75 : x
  2. Step 2: Convert to fraction form
    12,561.75/15,207.75 = 15,207.75/x
  3. Step 3: Cross multiply
    12,561.75x = 15,207.75 × 15,207.75
  4. Step 4: Simplify right side
    12,561.75x = 231,275,660.06
  5. Step 5: Solve for x
    x = 231,275,660.06/12,561.75
  6. Step 6: Final answer
    x = 18,411.10

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.