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Finding the Third Proportional to 18,776 and 40,320

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Solution

The third proportional to 18,776 and 40,320 is: 86,584.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776 : 40,320 = 40,320 : x
  2. Step 2: Convert to fraction form
    18,776/40,320 = 40,320/x
  3. Step 3: Cross multiply
    18,776x = 40,320 × 40,320
  4. Step 4: Simplify right side
    18,776x = 1,625,702,400
  5. Step 5: Solve for x
    x = 1,625,702,400/18,776
  6. Step 6: Final answer
    x = 86,584.06

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.