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Finding the Third Proportional to 18,776 and 38,128

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Solution

The third proportional to 18,776 and 38,128 is: 77,425.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776 : 38,128 = 38,128 : x
  2. Step 2: Convert to fraction form
    18,776/38,128 = 38,128/x
  3. Step 3: Cross multiply
    18,776x = 38,128 × 38,128
  4. Step 4: Simplify right side
    18,776x = 1,453,744,384
  5. Step 5: Solve for x
    x = 1,453,744,384/18,776
  6. Step 6: Final answer
    x = 77,425.67

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.