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Finding the Third Proportional to 19,620 and 43,128

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Solution

The third proportional to 19,620 and 43,128 is: 94,802.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,620 : 43,128 = 43,128 : x
  2. Step 2: Convert to fraction form
    19,620/43,128 = 43,128/x
  3. Step 3: Cross multiply
    19,620x = 43,128 × 43,128
  4. Step 4: Simplify right side
    19,620x = 1,860,024,384
  5. Step 5: Solve for x
    x = 1,860,024,384/19,620
  6. Step 6: Final answer
    x = 94,802.47

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.