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Finding the Third Proportional to 16,821 and 36,428.91

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Solution

The third proportional to 16,821 and 36,428.91 is: 78,893.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,821 : 36,428.91 = 36,428.91 : x
  2. Step 2: Convert to fraction form
    16,821/36,428.91 = 36,428.91/x
  3. Step 3: Cross multiply
    16,821x = 36,428.91 × 36,428.91
  4. Step 4: Simplify right side
    16,821x = 1,327,065,210.57
  5. Step 5: Solve for x
    x = 1,327,065,210.57/16,821
  6. Step 6: Final answer
    x = 78,893.36

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.