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Finding the Third Proportional to 18,821 and 29,190

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Solution

The third proportional to 18,821 and 29,190 is: 45,271.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821 : 29,190 = 29,190 : x
  2. Step 2: Convert to fraction form
    18,821/29,190 = 29,190/x
  3. Step 3: Cross multiply
    18,821x = 29,190 × 29,190
  4. Step 4: Simplify right side
    18,821x = 852,056,100
  5. Step 5: Solve for x
    x = 852,056,100/18,821
  6. Step 6: Final answer
    x = 45,271.56

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.