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Finding the Fourth Proportional to 19,162.88, 28,745.92 and 5,311.92

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Solution

The fourth proportional to 19,162.88, 28,745.92 and 5,311.92 is: 7,968.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,162.88 : 28,745.92 = 5,311.92 : x
  2. Step 2: Convert to fraction form
    19,162.88/28,745.92 = 5,311.92/x
  3. Step 3: Cross multiply
    19,162.88x = 28,745.92 × 5,311.92
  4. Step 4: Simplify right side
    19,162.88x = 152,696,027.37
  5. Step 5: Solve for x
    x = 152,696,027.37/19,162.88
  6. Step 6: Final answer
    x = 7,968.32

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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.