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Finding the Fourth Proportional to 8,601.12, 12,901.68 and 7,879.68

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Solution

The fourth proportional to 8,601.12, 12,901.68 and 7,879.68 is: 11,819.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,601.12 : 12,901.68 = 7,879.68 : x
  2. Step 2: Convert to fraction form
    8,601.12/12,901.68 = 7,879.68/x
  3. Step 3: Cross multiply
    8,601.12x = 12,901.68 × 7,879.68
  4. Step 4: Simplify right side
    8,601.12x = 101,661,109.86
  5. Step 5: Solve for x
    x = 101,661,109.86/8,601.12
  6. Step 6: Final answer
    x = 11,819.52

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Double scale
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Similar ratio
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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.