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Finding the Third Proportional to 20,851 and 30,724.75

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Solution

The third proportional to 20,851 and 30,724.75 is: 45,274.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851 : 30,724.75 = 30,724.75 : x
  2. Step 2: Convert to fraction form
    20,851/30,724.75 = 30,724.75/x
  3. Step 3: Cross multiply
    20,851x = 30,724.75 × 30,724.75
  4. Step 4: Simplify right side
    20,851x = 944,010,262.56
  5. Step 5: Solve for x
    x = 944,010,262.56/20,851
  6. Step 6: Final answer
    x = 45,274.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.