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Finding the Fourth Proportional to 11,841.54, 17,749.71 and 8,910.78

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Solution

The fourth proportional to 11,841.54, 17,749.71 and 8,910.78 is: 13,356.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,841.54 : 17,749.71 = 8,910.78 : x
  2. Step 2: Convert to fraction form
    11,841.54/17,749.71 = 8,910.78/x
  3. Step 3: Cross multiply
    11,841.54x = 17,749.71 × 8,910.78
  4. Step 4: Simplify right side
    11,841.54x = 158,163,760.87
  5. Step 5: Solve for x
    x = 158,163,760.87/11,841.54
  6. Step 6: Final answer
    x = 13,356.69

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1.5x scale

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.