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Finding the Third Proportional to 20,718 and 45,276

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Solution

The third proportional to 20,718 and 45,276 is: 98,943.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718 : 45,276 = 45,276 : x
  2. Step 2: Convert to fraction form
    20,718/45,276 = 45,276/x
  3. Step 3: Cross multiply
    20,718x = 45,276 × 45,276
  4. Step 4: Simplify right side
    20,718x = 2,049,916,176
  5. Step 5: Solve for x
    x = 2,049,916,176/20,718
  6. Step 6: Final answer
    x = 98,943.73

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.