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Finding the Fourth Proportional to 11,917.70, 17,876.41 and 2,911.89

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Solution

The fourth proportional to 11,917.70, 17,876.41 and 2,911.89 is: 4,367.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,917.70 : 17,876.41 = 2,911.89 : x
  2. Step 2: Convert to fraction form
    11,917.70/17,876.41 = 2,911.89/x
  3. Step 3: Cross multiply
    11,917.70x = 17,876.41 × 2,911.89
  4. Step 4: Simplify right side
    11,917.70x = 52,054,139.51
  5. Step 5: Solve for x
    x = 52,054,139.51/11,917.70
  6. Step 6: Final answer
    x = 4,367.80

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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.