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Finding the Fourth Proportional to 8,791.21, 13,172.22 and 6,188.68

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Solution

The fourth proportional to 8,791.21, 13,172.22 and 6,188.68 is: 9,272.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.21 : 13,172.22 = 6,188.68 : x
  2. Step 2: Convert to fraction form
    8,791.21/13,172.22 = 6,188.68/x
  3. Step 3: Cross multiply
    8,791.21x = 13,172.22 × 6,188.68
  4. Step 4: Simplify right side
    8,791.21x = 81,518,654.47
  5. Step 5: Solve for x
    x = 81,518,654.47/8,791.21
  6. Step 6: Final answer
    x = 9,272.75

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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.