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Finding the Third Proportional to 18,615 and 40,147

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Solution

The third proportional to 18,615 and 40,147 is: 86,585.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615 : 40,147 = 40,147 : x
  2. Step 2: Convert to fraction form
    18,615/40,147 = 40,147/x
  3. Step 3: Cross multiply
    18,615x = 40,147 × 40,147
  4. Step 4: Simplify right side
    18,615x = 1,611,781,609
  5. Step 5: Solve for x
    x = 1,611,781,609/18,615
  6. Step 6: Final answer
    x = 86,585.10

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.