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Finding the Fourth Proportional to 8,379.39, 12,564.79 and 4,432.78

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Solution

The fourth proportional to 8,379.39, 12,564.79 and 4,432.78 is: 6,646.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.39 : 12,564.79 = 4,432.78 : x
  2. Step 2: Convert to fraction form
    8,379.39/12,564.79 = 4,432.78/x
  3. Step 3: Cross multiply
    8,379.39x = 12,564.79 × 4,432.78
  4. Step 4: Simplify right side
    8,379.39x = 55,696,979.37
  5. Step 5: Solve for x
    x = 55,696,979.37/8,379.39
  6. Step 6: Final answer
    x = 6,646.90

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1.5x scale

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.