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Finding the Third Proportional to 8,221.50 and 12,435.75

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Solution

The third proportional to 8,221.50 and 12,435.75 is: 18,810.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,221.50 : 12,435.75 = 12,435.75 : x
  2. Step 2: Convert to fraction form
    8,221.50/12,435.75 = 12,435.75/x
  3. Step 3: Cross multiply
    8,221.50x = 12,435.75 × 12,435.75
  4. Step 4: Simplify right side
    8,221.50x = 154,647,878.06
  5. Step 5: Solve for x
    x = 154,647,878.06/8,221.50
  6. Step 6: Final answer
    x = 18,810.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.