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Finding the Fourth Proportional to 7,919.79, 11,879.44 and 3,762.79

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Solution

The fourth proportional to 7,919.79, 11,879.44 and 3,762.79 is: 5,644.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.79 : 11,879.44 = 3,762.79 : x
  2. Step 2: Convert to fraction form
    7,919.79/11,879.44 = 3,762.79/x
  3. Step 3: Cross multiply
    7,919.79x = 11,879.44 × 3,762.79
  4. Step 4: Simplify right side
    7,919.79x = 44,699,838.04
  5. Step 5: Solve for x
    x = 44,699,838.04/7,919.79
  6. Step 6: Final answer
    x = 5,644.07

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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.