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Finding the Third Proportional to 13,689 and 21,151.13

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Solution

The third proportional to 13,689 and 21,151.13 is: 32,680.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689 : 21,151.13 = 21,151.13 : x
  2. Step 2: Convert to fraction form
    13,689/21,151.13 = 21,151.13/x
  3. Step 3: Cross multiply
    13,689x = 21,151.13 × 21,151.13
  4. Step 4: Simplify right side
    13,689x = 447,370,088.77
  5. Step 5: Solve for x
    x = 447,370,088.77/13,689
  6. Step 6: Final answer
    x = 32,680.99

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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.