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Finding the Fourth Proportional to 11,668.88, 17,505.14 and 3,879.51

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Solution

The fourth proportional to 11,668.88, 17,505.14 and 3,879.51 is: 5,819.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,668.88 : 17,505.14 = 3,879.51 : x
  2. Step 2: Convert to fraction form
    11,668.88/17,505.14 = 3,879.51/x
  3. Step 3: Cross multiply
    11,668.88x = 17,505.14 × 3,879.51
  4. Step 4: Simplify right side
    11,668.88x = 67,911,346.28
  5. Step 5: Solve for x
    x = 67,911,346.28/11,668.88
  6. Step 6: Final answer
    x = 5,819.87

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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.