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Finding the Third Proportional to 12,954 and 20,480

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Solution

The third proportional to 12,954 and 20,480 is: 32,378.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,954 : 20,480 = 20,480 : x
  2. Step 2: Convert to fraction form
    12,954/20,480 = 20,480/x
  3. Step 3: Cross multiply
    12,954x = 20,480 × 20,480
  4. Step 4: Simplify right side
    12,954x = 419,430,400
  5. Step 5: Solve for x
    x = 419,430,400/12,954
  6. Step 6: Final answer
    x = 32,378.45

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.