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Finding the Third Proportional to 18,339 and 35,220

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Solution

The third proportional to 18,339 and 35,220 is: 67,639.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339 : 35,220 = 35,220 : x
  2. Step 2: Convert to fraction form
    18,339/35,220 = 35,220/x
  3. Step 3: Cross multiply
    18,339x = 35,220 × 35,220
  4. Step 4: Simplify right side
    18,339x = 1,240,448,400
  5. Step 5: Solve for x
    x = 1,240,448,400/18,339
  6. Step 6: Final answer
    x = 67,639.91

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Why These Related Problems?

These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.