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Finding the Fourth Proportional to 7,299.92, 10,949.94 and 3,139.64

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Solution

The fourth proportional to 7,299.92, 10,949.94 and 3,139.64 is: 4,709.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,299.92 : 10,949.94 = 3,139.64 : x
  2. Step 2: Convert to fraction form
    7,299.92/10,949.94 = 3,139.64/x
  3. Step 3: Cross multiply
    7,299.92x = 10,949.94 × 3,139.64
  4. Step 4: Simplify right side
    7,299.92x = 34,378,869.62
  5. Step 5: Solve for x
    x = 34,378,869.62/7,299.92
  6. Step 6: Final answer
    x = 4,709.49

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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.