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Finding the Third Proportional to 8,420 and 17,904

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Solution

The third proportional to 8,420 and 17,904 is: 38,070.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420 : 17,904 = 17,904 : x
  2. Step 2: Convert to fraction form
    8,420/17,904 = 17,904/x
  3. Step 3: Cross multiply
    8,420x = 17,904 × 17,904
  4. Step 4: Simplify right side
    8,420x = 320,553,216
  5. Step 5: Solve for x
    x = 320,553,216/8,420
  6. Step 6: Final answer
    x = 38,070.45

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.