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Finding the Fourth Proportional to 28,691.70, 43,040.20 and 11,162.86

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Solution

The fourth proportional to 28,691.70, 43,040.20 and 11,162.86 is: 16,745.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.70 : 43,040.20 = 11,162.86 : x
  2. Step 2: Convert to fraction form
    28,691.70/43,040.20 = 11,162.86/x
  3. Step 3: Cross multiply
    28,691.70x = 43,040.20 × 11,162.86
  4. Step 4: Simplify right side
    28,691.70x = 480,451,726.97
  5. Step 5: Solve for x
    x = 480,451,726.97/28,691.70
  6. Step 6: Final answer
    x = 16,745.32

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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.