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Finding the Third Proportional to 16,638.75 and 21,907.13

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Solution

The third proportional to 16,638.75 and 21,907.13 is: 28,843.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,638.75 : 21,907.13 = 21,907.13 : x
  2. Step 2: Convert to fraction form
    16,638.75/21,907.13 = 21,907.13/x
  3. Step 3: Cross multiply
    16,638.75x = 21,907.13 × 21,907.13
  4. Step 4: Simplify right side
    16,638.75x = 479,922,125.77
  5. Step 5: Solve for x
    x = 479,922,125.77/16,638.75
  6. Step 6: Final answer
    x = 28,843.64

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.