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Finding the Third Proportional to 20,216 and 30,430

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Solution

The third proportional to 20,216 and 30,430 is: 45,804.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,216 : 30,430 = 30,430 : x
  2. Step 2: Convert to fraction form
    20,216/30,430 = 30,430/x
  3. Step 3: Cross multiply
    20,216x = 30,430 × 30,430
  4. Step 4: Simplify right side
    20,216x = 925,984,900
  5. Step 5: Solve for x
    x = 925,984,900/20,216
  6. Step 6: Final answer
    x = 45,804.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.