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Finding the Third Proportional to 8,428.50 and 18,213.75

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Solution

The third proportional to 8,428.50 and 18,213.75 is: 39,359.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.50 : 18,213.75 = 18,213.75 : x
  2. Step 2: Convert to fraction form
    8,428.50/18,213.75 = 18,213.75/x
  3. Step 3: Cross multiply
    8,428.50x = 18,213.75 × 18,213.75
  4. Step 4: Simplify right side
    8,428.50x = 331,740,689.06
  5. Step 5: Solve for x
    x = 331,740,689.06/8,428.50
  6. Step 6: Final answer
    x = 39,359.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.