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Finding the Third Proportional to 21,620 and 47,028

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Solution

The third proportional to 21,620 and 47,028 is: 102,295.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620 : 47,028 = 47,028 : x
  2. Step 2: Convert to fraction form
    21,620/47,028 = 47,028/x
  3. Step 3: Cross multiply
    21,620x = 47,028 × 47,028
  4. Step 4: Simplify right side
    21,620x = 2,211,632,784
  5. Step 5: Solve for x
    x = 2,211,632,784/21,620
  6. Step 6: Final answer
    x = 102,295.69

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.