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Finding the Third Proportional to 20,840 and 45,240

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Solution

The third proportional to 20,840 and 45,240 is: 98,208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840 : 45,240 = 45,240 : x
  2. Step 2: Convert to fraction form
    20,840/45,240 = 45,240/x
  3. Step 3: Cross multiply
    20,840x = 45,240 × 45,240
  4. Step 4: Simplify right side
    20,840x = 2,046,657,600
  5. Step 5: Solve for x
    x = 2,046,657,600/20,840
  6. Step 6: Final answer
    x = 98,208.14

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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.