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Finding the Third Proportional to 17,740 and 39,160

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Solution

The third proportional to 17,740 and 39,160 is: 86,443.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,740 : 39,160 = 39,160 : x
  2. Step 2: Convert to fraction form
    17,740/39,160 = 39,160/x
  3. Step 3: Cross multiply
    17,740x = 39,160 × 39,160
  4. Step 4: Simplify right side
    17,740x = 1,533,505,600
  5. Step 5: Solve for x
    x = 1,533,505,600/17,740
  6. Step 6: Final answer
    x = 86,443.38

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.