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Finding the Fourth Proportional to 11,761.08, 17,641.62 and 5,187.30

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Solution

The fourth proportional to 11,761.08, 17,641.62 and 5,187.30 is: 7,780.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,761.08 : 17,641.62 = 5,187.30 : x
  2. Step 2: Convert to fraction form
    11,761.08/17,641.62 = 5,187.30/x
  3. Step 3: Cross multiply
    11,761.08x = 17,641.62 × 5,187.30
  4. Step 4: Simplify right side
    11,761.08x = 91,512,375.43
  5. Step 5: Solve for x
    x = 91,512,375.43/11,761.08
  6. Step 6: Final answer
    x = 7,780.95

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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.