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Finding the Third Proportional to 18,036 and 19,764

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Solution

The third proportional to 18,036 and 19,764 is: 21,657.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,036 : 19,764 = 19,764 : x
  2. Step 2: Convert to fraction form
    18,036/19,764 = 19,764/x
  3. Step 3: Cross multiply
    18,036x = 19,764 × 19,764
  4. Step 4: Simplify right side
    18,036x = 390,615,696
  5. Step 5: Solve for x
    x = 390,615,696/18,036
  6. Step 6: Final answer
    x = 21,657.56

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.