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Finding the Fourth Proportional to 8,458.56, 12,690 and 5,360.58

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Solution

The fourth proportional to 8,458.56, 12,690 and 5,360.58 is: 8,042.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.56 : 12,690 = 5,360.58 : x
  2. Step 2: Convert to fraction form
    8,458.56/12,690 = 5,360.58/x
  3. Step 3: Cross multiply
    8,458.56x = 12,690 × 5,360.58
  4. Step 4: Simplify right side
    8,458.56x = 68,025,760.20
  5. Step 5: Solve for x
    x = 68,025,760.20/8,458.56
  6. Step 6: Final answer
    x = 8,042.24

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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.