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Finding the Third Proportional to 18,870 and 40,985

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Solution

The third proportional to 18,870 and 40,985 is: 89,018.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870 : 40,985 = 40,985 : x
  2. Step 2: Convert to fraction form
    18,870/40,985 = 40,985/x
  3. Step 3: Cross multiply
    18,870x = 40,985 × 40,985
  4. Step 4: Simplify right side
    18,870x = 1,679,770,225
  5. Step 5: Solve for x
    x = 1,679,770,225/18,870
  6. Step 6: Final answer
    x = 89,018.03

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.