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Finding the Third Proportional to 19,321 and 40,718

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Solution

The third proportional to 19,321 and 40,718 is: 85,811.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,321 : 40,718 = 40,718 : x
  2. Step 2: Convert to fraction form
    19,321/40,718 = 40,718/x
  3. Step 3: Cross multiply
    19,321x = 40,718 × 40,718
  4. Step 4: Simplify right side
    19,321x = 1,657,955,524
  5. Step 5: Solve for x
    x = 1,657,955,524/19,321
  6. Step 6: Final answer
    x = 85,811.06

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.