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Finding the Fourth Proportional to 10,661.22, 15,968.58 and 8,791.32

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Solution

The fourth proportional to 10,661.22, 15,968.58 and 8,791.32 is: 13,167.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.22 : 15,968.58 = 8,791.32 : x
  2. Step 2: Convert to fraction form
    10,661.22/15,968.58 = 8,791.32/x
  3. Step 3: Cross multiply
    10,661.22x = 15,968.58 × 8,791.32
  4. Step 4: Simplify right side
    10,661.22x = 140,384,896.73
  5. Step 5: Solve for x
    x = 140,384,896.73/10,661.22
  6. Step 6: Final answer
    x = 13,167.81

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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.