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Finding the Fourth Proportional to 12,620.92, 18,944.02 and 5,229.72

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Solution

The fourth proportional to 12,620.92, 18,944.02 and 5,229.72 is: 7,849.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.92 : 18,944.02 = 5,229.72 : x
  2. Step 2: Convert to fraction form
    12,620.92/18,944.02 = 5,229.72/x
  3. Step 3: Cross multiply
    12,620.92x = 18,944.02 × 5,229.72
  4. Step 4: Simplify right side
    12,620.92x = 99,071,920.27
  5. Step 5: Solve for x
    x = 99,071,920.27/12,620.92
  6. Step 6: Final answer
    x = 7,849.82

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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.