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Finding the Fourth Proportional to 8,138.99, 12,210.33 and 2,944.87

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Solution

The fourth proportional to 8,138.99, 12,210.33 and 2,944.87 is: 4,417.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.99 : 12,210.33 = 2,944.87 : x
  2. Step 2: Convert to fraction form
    8,138.99/12,210.33 = 2,944.87/x
  3. Step 3: Cross multiply
    8,138.99x = 12,210.33 × 2,944.87
  4. Step 4: Simplify right side
    8,138.99x = 35,957,834.51
  5. Step 5: Solve for x
    x = 35,957,834.51/8,138.99
  6. Step 6: Final answer
    x = 4,417.97

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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.