Home / 7,917.75-11,876.78-2,989.71

Finding the Fourth Proportional to 7,917.75, 11,876.78 and 2,989.71

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Solution

The fourth proportional to 7,917.75, 11,876.78 and 2,989.71 is: 4,484.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.75 : 11,876.78 = 2,989.71 : x
  2. Step 2: Convert to fraction form
    7,917.75/11,876.78 = 2,989.71/x
  3. Step 3: Cross multiply
    7,917.75x = 11,876.78 × 2,989.71
  4. Step 4: Simplify right side
    7,917.75x = 35,508,118.59
  5. Step 5: Solve for x
    x = 35,508,118.59/7,917.75
  6. Step 6: Final answer
    x = 4,484.62

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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.