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Finding the Third Proportional to 5,135.75 and 10,515

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Solution

The third proportional to 5,135.75 and 10,515 is: 21,528.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.75 : 10,515 = 10,515 : x
  2. Step 2: Convert to fraction form
    5,135.75/10,515 = 10,515/x
  3. Step 3: Cross multiply
    5,135.75x = 10,515 × 10,515
  4. Step 4: Simplify right side
    5,135.75x = 110,565,225
  5. Step 5: Solve for x
    x = 110,565,225/5,135.75
  6. Step 6: Final answer
    x = 21,528.55

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.