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Finding the Third Proportional to 4,515 and 7,140.75

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Solution

The third proportional to 4,515 and 7,140.75 is: 11,293.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,515 : 7,140.75 = 7,140.75 : x
  2. Step 2: Convert to fraction form
    4,515/7,140.75 = 7,140.75/x
  3. Step 3: Cross multiply
    4,515x = 7,140.75 × 7,140.75
  4. Step 4: Simplify right side
    4,515x = 50,990,310.56
  5. Step 5: Solve for x
    x = 50,990,310.56/4,515
  6. Step 6: Final answer
    x = 11,293.54

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.