Home / 7,439.24-11,147-3,929.12

Finding the Fourth Proportional to 7,439.24, 11,147 and 3,929.12

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Solution

The fourth proportional to 7,439.24, 11,147 and 3,929.12 is: 5,887.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,439.24 : 11,147 = 3,929.12 : x
  2. Step 2: Convert to fraction form
    7,439.24/11,147 = 3,929.12/x
  3. Step 3: Cross multiply
    7,439.24x = 11,147 × 3,929.12
  4. Step 4: Simplify right side
    7,439.24x = 43,797,900.64
  5. Step 5: Solve for x
    x = 43,797,900.64/7,439.24
  6. Step 6: Final answer
    x = 5,887.42

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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.