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Finding the Fourth Proportional to 18,869.91, 28,305.14 and 7,183.77

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Solution

The fourth proportional to 18,869.91, 28,305.14 and 7,183.77 is: 10,775.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.91 : 28,305.14 = 7,183.77 : x
  2. Step 2: Convert to fraction form
    18,869.91/28,305.14 = 7,183.77/x
  3. Step 3: Cross multiply
    18,869.91x = 28,305.14 × 7,183.77
  4. Step 4: Simplify right side
    18,869.91x = 203,337,579.66
  5. Step 5: Solve for x
    x = 203,337,579.66/18,869.91
  6. Step 6: Final answer
    x = 10,775.76

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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.