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Finding the Third Proportional to 21,561.38 and 29,690.44

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Solution

The third proportional to 21,561.38 and 29,690.44 is: 40,884.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.38 : 29,690.44 = 29,690.44 : x
  2. Step 2: Convert to fraction form
    21,561.38/29,690.44 = 29,690.44/x
  3. Step 3: Cross multiply
    21,561.38x = 29,690.44 × 29,690.44
  4. Step 4: Simplify right side
    21,561.38x = 881,522,078.94
  5. Step 5: Solve for x
    x = 881,522,078.94/21,561.38
  6. Step 6: Final answer
    x = 40,884.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.