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Finding the Fourth Proportional to 8,879.16, 13,318.80 and 2,639.28

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Solution

The fourth proportional to 8,879.16, 13,318.80 and 2,639.28 is: 3,958.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.16 : 13,318.80 = 2,639.28 : x
  2. Step 2: Convert to fraction form
    8,879.16/13,318.80 = 2,639.28/x
  3. Step 3: Cross multiply
    8,879.16x = 13,318.80 × 2,639.28
  4. Step 4: Simplify right side
    8,879.16x = 35,152,042.46
  5. Step 5: Solve for x
    x = 35,152,042.46/8,879.16
  6. Step 6: Final answer
    x = 3,958.94

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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.