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Finding the Third Proportional to 18,758 and 40,639

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Solution

The third proportional to 18,758 and 40,639 is: 88,043.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758 : 40,639 = 40,639 : x
  2. Step 2: Convert to fraction form
    18,758/40,639 = 40,639/x
  3. Step 3: Cross multiply
    18,758x = 40,639 × 40,639
  4. Step 4: Simplify right side
    18,758x = 1,651,528,321
  5. Step 5: Solve for x
    x = 1,651,528,321/18,758
  6. Step 6: Final answer
    x = 88,043.95

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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.