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Finding the Third Proportional to 8,655 and 18,912.75

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Solution

The third proportional to 8,655 and 18,912.75 is: 41,327.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655 : 18,912.75 = 18,912.75 : x
  2. Step 2: Convert to fraction form
    8,655/18,912.75 = 18,912.75/x
  3. Step 3: Cross multiply
    8,655x = 18,912.75 × 18,912.75
  4. Step 4: Simplify right side
    8,655x = 357,692,112.56
  5. Step 5: Solve for x
    x = 357,692,112.56/8,655
  6. Step 6: Final answer
    x = 41,327.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.