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Finding the Third Proportional to 18,360 and 38,178

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Solution

The third proportional to 18,360 and 38,178 is: 79,387.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,360 : 38,178 = 38,178 : x
  2. Step 2: Convert to fraction form
    18,360/38,178 = 38,178/x
  3. Step 3: Cross multiply
    18,360x = 38,178 × 38,178
  4. Step 4: Simplify right side
    18,360x = 1,457,559,684
  5. Step 5: Solve for x
    x = 1,457,559,684/18,360
  6. Step 6: Final answer
    x = 79,387.78

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.