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Finding the Fourth Proportional to 20,269, 30,403.50 and 6,418

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Solution

The fourth proportional to 20,269, 30,403.50 and 6,418 is: 9,627

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,269 : 30,403.50 = 6,418 : x
  2. Step 2: Convert to fraction form
    20,269/30,403.50 = 6,418/x
  3. Step 3: Cross multiply
    20,269x = 30,403.50 × 6,418
  4. Step 4: Simplify right side
    20,269x = 195,129,663
  5. Step 5: Solve for x
    x = 195,129,663/20,269
  6. Step 6: Final answer
    x = 9,627

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.