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Finding the Fourth Proportional to 6,558.21, 9,826.38 and 5,391.81

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Solution

The fourth proportional to 6,558.21, 9,826.38 and 5,391.81 is: 8,078.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,558.21 : 9,826.38 = 5,391.81 : x
  2. Step 2: Convert to fraction form
    6,558.21/9,826.38 = 5,391.81/x
  3. Step 3: Cross multiply
    6,558.21x = 9,826.38 × 5,391.81
  4. Step 4: Simplify right side
    6,558.21x = 52,981,973.95
  5. Step 5: Solve for x
    x = 52,981,973.95/6,558.21
  6. Step 6: Final answer
    x = 8,078.72

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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.