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Finding the Fourth Proportional to 28,516.36, 42,773.82 and 7,739.32

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Solution

The fourth proportional to 28,516.36, 42,773.82 and 7,739.32 is: 11,608.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,516.36 : 42,773.82 = 7,739.32 : x
  2. Step 2: Convert to fraction form
    28,516.36/42,773.82 = 7,739.32/x
  3. Step 3: Cross multiply
    28,516.36x = 42,773.82 × 7,739.32
  4. Step 4: Simplify right side
    28,516.36x = 331,040,280.60
  5. Step 5: Solve for x
    x = 331,040,280.60/28,516.36
  6. Step 6: Final answer
    x = 11,608.78

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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.