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Finding the Third Proportional to 19,140 and 38,796

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Solution

The third proportional to 19,140 and 38,796 is: 78,637.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140 : 38,796 = 38,796 : x
  2. Step 2: Convert to fraction form
    19,140/38,796 = 38,796/x
  3. Step 3: Cross multiply
    19,140x = 38,796 × 38,796
  4. Step 4: Simplify right side
    19,140x = 1,505,129,616
  5. Step 5: Solve for x
    x = 1,505,129,616/19,140
  6. Step 6: Final answer
    x = 78,637.91

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.