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Finding the Third Proportional to 4,000 and 7,136

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Solution

The third proportional to 4,000 and 7,136 is: 12,730.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,000 : 7,136 = 7,136 : x
  2. Step 2: Convert to fraction form
    4,000/7,136 = 7,136/x
  3. Step 3: Cross multiply
    4,000x = 7,136 × 7,136
  4. Step 4: Simplify right side
    4,000x = 50,922,496
  5. Step 5: Solve for x
    x = 50,922,496/4,000
  6. Step 6: Final answer
    x = 12,730.62

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.