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Finding the Third Proportional to 8,128 and 11,418

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Solution

The third proportional to 8,128 and 11,418 is: 16,039.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128 : 11,418 = 11,418 : x
  2. Step 2: Convert to fraction form
    8,128/11,418 = 11,418/x
  3. Step 3: Cross multiply
    8,128x = 11,418 × 11,418
  4. Step 4: Simplify right side
    8,128x = 130,370,724
  5. Step 5: Solve for x
    x = 130,370,724/8,128
  6. Step 6: Final answer
    x = 16,039.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.