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Finding the Third Proportional to 18,477 and 20,072

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Solution

The third proportional to 18,477 and 20,072 is: 21,804.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,477 : 20,072 = 20,072 : x
  2. Step 2: Convert to fraction form
    18,477/20,072 = 20,072/x
  3. Step 3: Cross multiply
    18,477x = 20,072 × 20,072
  4. Step 4: Simplify right side
    18,477x = 402,885,184
  5. Step 5: Solve for x
    x = 402,885,184/18,477
  6. Step 6: Final answer
    x = 21,804.69

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.