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Finding the Third Proportional to 13,312 and 20,609

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Solution

The third proportional to 13,312 and 20,609 is: 31,905.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,312 : 20,609 = 20,609 : x
  2. Step 2: Convert to fraction form
    13,312/20,609 = 20,609/x
  3. Step 3: Cross multiply
    13,312x = 20,609 × 20,609
  4. Step 4: Simplify right side
    13,312x = 424,730,881
  5. Step 5: Solve for x
    x = 424,730,881/13,312
  6. Step 6: Final answer
    x = 31,905.87

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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.