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Finding the Third Proportional to 18,140 and 38,424

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Solution

The third proportional to 18,140 and 38,424 is: 81,389.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,140 : 38,424 = 38,424 : x
  2. Step 2: Convert to fraction form
    18,140/38,424 = 38,424/x
  3. Step 3: Cross multiply
    18,140x = 38,424 × 38,424
  4. Step 4: Simplify right side
    18,140x = 1,476,403,776
  5. Step 5: Solve for x
    x = 1,476,403,776/18,140
  6. Step 6: Final answer
    x = 81,389.40

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.