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Finding the Third Proportional to 13,128 and 19,620

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Solution

The third proportional to 13,128 and 19,620 is: 29,322.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128 : 19,620 = 19,620 : x
  2. Step 2: Convert to fraction form
    13,128/19,620 = 19,620/x
  3. Step 3: Cross multiply
    13,128x = 19,620 × 19,620
  4. Step 4: Simplify right side
    13,128x = 384,944,400
  5. Step 5: Solve for x
    x = 384,944,400/13,128
  6. Step 6: Final answer
    x = 29,322.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.