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Finding the Third Proportional to 18,728 and 28,164

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Solution

The third proportional to 18,728 and 28,164 is: 42,354.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728 : 28,164 = 28,164 : x
  2. Step 2: Convert to fraction form
    18,728/28,164 = 28,164/x
  3. Step 3: Cross multiply
    18,728x = 28,164 × 28,164
  4. Step 4: Simplify right side
    18,728x = 793,210,896
  5. Step 5: Solve for x
    x = 793,210,896/18,728
  6. Step 6: Final answer
    x = 42,354.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.