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Finding the Fourth Proportional to 8,379.86, 12,565.46 and 3,448.58

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Solution

The fourth proportional to 8,379.86, 12,565.46 and 3,448.58 is: 5,171.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.86 : 12,565.46 = 3,448.58 : x
  2. Step 2: Convert to fraction form
    8,379.86/12,565.46 = 3,448.58/x
  3. Step 3: Cross multiply
    8,379.86x = 12,565.46 × 3,448.58
  4. Step 4: Simplify right side
    8,379.86x = 43,332,994.05
  5. Step 5: Solve for x
    x = 43,332,994.05/8,379.86
  6. Step 6: Final answer
    x = 5,171.09

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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.