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Finding the Third Proportional to 18,618 and 40,921

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Solution

The third proportional to 18,618 and 40,921 is: 89,941.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618 : 40,921 = 40,921 : x
  2. Step 2: Convert to fraction form
    18,618/40,921 = 40,921/x
  3. Step 3: Cross multiply
    18,618x = 40,921 × 40,921
  4. Step 4: Simplify right side
    18,618x = 1,674,528,241
  5. Step 5: Solve for x
    x = 1,674,528,241/18,618
  6. Step 6: Final answer
    x = 89,941.36

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.