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Finding the Third Proportional to 18,315 and 39,222

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Solution

The third proportional to 18,315 and 39,222 is: 83,994.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,315 : 39,222 = 39,222 : x
  2. Step 2: Convert to fraction form
    18,315/39,222 = 39,222/x
  3. Step 3: Cross multiply
    18,315x = 39,222 × 39,222
  4. Step 4: Simplify right side
    18,315x = 1,538,365,284
  5. Step 5: Solve for x
    x = 1,538,365,284/18,315
  6. Step 6: Final answer
    x = 83,994.83

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.