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Finding the Fourth Proportional to 11,777.76, 16,254.12 and 7,791.96

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Solution

The fourth proportional to 11,777.76, 16,254.12 and 7,791.96 is: 10,753.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,777.76 : 16,254.12 = 7,791.96 : x
  2. Step 2: Convert to fraction form
    11,777.76/16,254.12 = 7,791.96/x
  3. Step 3: Cross multiply
    11,777.76x = 16,254.12 × 7,791.96
  4. Step 4: Simplify right side
    11,777.76x = 126,651,452.88
  5. Step 5: Solve for x
    x = 126,651,452.88/11,777.76
  6. Step 6: Final answer
    x = 10,753.44

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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.