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Finding the Fourth Proportional to 11,405.27, 15,739.11 and 6,369.57

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Solution

The fourth proportional to 11,405.27, 15,739.11 and 6,369.57 is: 8,789.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,405.27 : 15,739.11 = 6,369.57 : x
  2. Step 2: Convert to fraction form
    11,405.27/15,739.11 = 6,369.57/x
  3. Step 3: Cross multiply
    11,405.27x = 15,739.11 × 6,369.57
  4. Step 4: Simplify right side
    11,405.27x = 100,251,421.90
  5. Step 5: Solve for x
    x = 100,251,421.90/11,405.27
  6. Step 6: Final answer
    x = 8,789.92

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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.