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Finding the Third Proportional to 18,628 and 36,319

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Solution

The third proportional to 18,628 and 36,319 is: 70,811.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628 : 36,319 = 36,319 : x
  2. Step 2: Convert to fraction form
    18,628/36,319 = 36,319/x
  3. Step 3: Cross multiply
    18,628x = 36,319 × 36,319
  4. Step 4: Simplify right side
    18,628x = 1,319,069,761
  5. Step 5: Solve for x
    x = 1,319,069,761/18,628
  6. Step 6: Final answer
    x = 70,811.13

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.