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Finding the Third Proportional to 20,870 and 45,280

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Solution

The third proportional to 20,870 and 45,280 is: 98,240.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870 : 45,280 = 45,280 : x
  2. Step 2: Convert to fraction form
    20,870/45,280 = 45,280/x
  3. Step 3: Cross multiply
    20,870x = 45,280 × 45,280
  4. Step 4: Simplify right side
    20,870x = 2,050,278,400
  5. Step 5: Solve for x
    x = 2,050,278,400/20,870
  6. Step 6: Final answer
    x = 98,240.46

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.