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Finding the Third Proportional to 20,908.13 and 31,605.19

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Solution

The third proportional to 20,908.13 and 31,605.19 is: 47,775.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.13 : 31,605.19 = 31,605.19 : x
  2. Step 2: Convert to fraction form
    20,908.13/31,605.19 = 31,605.19/x
  3. Step 3: Cross multiply
    20,908.13x = 31,605.19 × 31,605.19
  4. Step 4: Simplify right side
    20,908.13x = 998,887,876.91
  5. Step 5: Solve for x
    x = 998,887,876.91/20,908.13
  6. Step 6: Final answer
    x = 47,775.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.