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Finding the Third Proportional to 13,312 and 20,211

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Solution

The third proportional to 13,312 and 20,211 is: 30,685.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,312 : 20,211 = 20,211 : x
  2. Step 2: Convert to fraction form
    13,312/20,211 = 20,211/x
  3. Step 3: Cross multiply
    13,312x = 20,211 × 20,211
  4. Step 4: Simplify right side
    13,312x = 408,484,521
  5. Step 5: Solve for x
    x = 408,484,521/13,312
  6. Step 6: Final answer
    x = 30,685.44

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.