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Finding the Fourth Proportional to 5,917.76, 8,856.96 and 3,969.28

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Solution

The fourth proportional to 5,917.76, 8,856.96 and 3,969.28 is: 5,940.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,917.76 : 8,856.96 = 3,969.28 : x
  2. Step 2: Convert to fraction form
    5,917.76/8,856.96 = 3,969.28/x
  3. Step 3: Cross multiply
    5,917.76x = 8,856.96 × 3,969.28
  4. Step 4: Simplify right side
    5,917.76x = 35,155,754.19
  5. Step 5: Solve for x
    x = 35,155,754.19/5,917.76
  6. Step 6: Final answer
    x = 5,940.72

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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.