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Finding the Fourth Proportional to 7,659.86, 11,489.78 and 3,960.18

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Solution

The fourth proportional to 7,659.86, 11,489.78 and 3,960.18 is: 5,940.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,659.86 : 11,489.78 = 3,960.18 : x
  2. Step 2: Convert to fraction form
    7,659.86/11,489.78 = 3,960.18/x
  3. Step 3: Cross multiply
    7,659.86x = 11,489.78 × 3,960.18
  4. Step 4: Simplify right side
    7,659.86x = 45,501,606.86
  5. Step 5: Solve for x
    x = 45,501,606.86/7,659.86
  6. Step 6: Final answer
    x = 5,940.27

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Half scale
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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.