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Finding the Fourth Proportional to 8,539.68, 11,791.76 and 8,104.80

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Solution

The fourth proportional to 8,539.68, 11,791.76 and 8,104.80 is: 11,191.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,539.68 : 11,791.76 = 8,104.80 : x
  2. Step 2: Convert to fraction form
    8,539.68/11,791.76 = 8,104.80/x
  3. Step 3: Cross multiply
    8,539.68x = 11,791.76 × 8,104.80
  4. Step 4: Simplify right side
    8,539.68x = 95,569,856.45
  5. Step 5: Solve for x
    x = 95,569,856.45/8,539.68
  6. Step 6: Final answer
    x = 11,191.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.