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Finding the Third Proportional to 4,536 and 7,119

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Solution

The third proportional to 4,536 and 7,119 is: 11,172.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,536 : 7,119 = 7,119 : x
  2. Step 2: Convert to fraction form
    4,536/7,119 = 7,119/x
  3. Step 3: Cross multiply
    4,536x = 7,119 × 7,119
  4. Step 4: Simplify right side
    4,536x = 50,680,161
  5. Step 5: Solve for x
    x = 50,680,161/4,536
  6. Step 6: Final answer
    x = 11,172.88

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.