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Finding the Fourth Proportional to 20,632.88, 30,949.73 and 6,781.88

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Solution

The fourth proportional to 20,632.88, 30,949.73 and 6,781.88 is: 10,172.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,632.88 : 30,949.73 = 6,781.88 : x
  2. Step 2: Convert to fraction form
    20,632.88/30,949.73 = 6,781.88/x
  3. Step 3: Cross multiply
    20,632.88x = 30,949.73 × 6,781.88
  4. Step 4: Simplify right side
    20,632.88x = 209,897,166.23
  5. Step 5: Solve for x
    x = 209,897,166.23/20,632.88
  6. Step 6: Final answer
    x = 10,172.95

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1.5x scale

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.