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Finding the Third Proportional to 7,515 and 12,136.50

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Solution

The third proportional to 7,515 and 12,136.50 is: 19,600.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,515 : 12,136.50 = 12,136.50 : x
  2. Step 2: Convert to fraction form
    7,515/12,136.50 = 12,136.50/x
  3. Step 3: Cross multiply
    7,515x = 12,136.50 × 12,136.50
  4. Step 4: Simplify right side
    7,515x = 147,294,632.25
  5. Step 5: Solve for x
    x = 147,294,632.25/7,515
  6. Step 6: Final answer
    x = 19,600.08

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.