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Finding the Third Proportional to 8,440 and 18,128

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Solution

The third proportional to 8,440 and 18,128 is: 38,936.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,440 : 18,128 = 18,128 : x
  2. Step 2: Convert to fraction form
    8,440/18,128 = 18,128/x
  3. Step 3: Cross multiply
    8,440x = 18,128 × 18,128
  4. Step 4: Simplify right side
    8,440x = 328,624,384
  5. Step 5: Solve for x
    x = 328,624,384/8,440
  6. Step 6: Final answer
    x = 38,936.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.