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Finding the Third Proportional to 7,150 and 11,415

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Solution

The third proportional to 7,150 and 11,415 is: 18,224.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,150 : 11,415 = 11,415 : x
  2. Step 2: Convert to fraction form
    7,150/11,415 = 11,415/x
  3. Step 3: Cross multiply
    7,150x = 11,415 × 11,415
  4. Step 4: Simplify right side
    7,150x = 130,302,225
  5. Step 5: Solve for x
    x = 130,302,225/7,150
  6. Step 6: Final answer
    x = 18,224.09

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.