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Finding the Fourth Proportional to 20,146.88, 30,217.92 and 5,356.88

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Solution

The fourth proportional to 20,146.88, 30,217.92 and 5,356.88 is: 8,034.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,146.88 : 30,217.92 = 5,356.88 : x
  2. Step 2: Convert to fraction form
    20,146.88/30,217.92 = 5,356.88/x
  3. Step 3: Cross multiply
    20,146.88x = 30,217.92 × 5,356.88
  4. Step 4: Simplify right side
    20,146.88x = 161,873,771.29
  5. Step 5: Solve for x
    x = 161,873,771.29/20,146.88
  6. Step 6: Final answer
    x = 8,034.68

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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.