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Finding the Fourth Proportional to 20,472.96, 30,716.96 and 8,629.73

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Solution

The fourth proportional to 20,472.96, 30,716.96 and 8,629.73 is: 12,947.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.96 : 30,716.96 = 8,629.73 : x
  2. Step 2: Convert to fraction form
    20,472.96/30,716.96 = 8,629.73/x
  3. Step 3: Cross multiply
    20,472.96x = 30,716.96 × 8,629.73
  4. Step 4: Simplify right side
    20,472.96x = 265,079,071.22
  5. Step 5: Solve for x
    x = 265,079,071.22/20,472.96
  6. Step 6: Final answer
    x = 12,947.76

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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.