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Finding the Fourth Proportional to 7,321.99, 10,974.87 and 3,616.39

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Solution

The fourth proportional to 7,321.99, 10,974.87 and 3,616.39 is: 5,420.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.99 : 10,974.87 = 3,616.39 : x
  2. Step 2: Convert to fraction form
    7,321.99/10,974.87 = 3,616.39/x
  3. Step 3: Cross multiply
    7,321.99x = 10,974.87 × 3,616.39
  4. Step 4: Simplify right side
    7,321.99x = 39,689,410.12
  5. Step 5: Solve for x
    x = 39,689,410.12/7,321.99
  6. Step 6: Final answer
    x = 5,420.58

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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.