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Finding the Fourth Proportional to 6,999.75, 9,659.70 and 3,855.96

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Solution

The fourth proportional to 6,999.75, 9,659.70 and 3,855.96 is: 5,321.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.75 : 9,659.70 = 3,855.96 : x
  2. Step 2: Convert to fraction form
    6,999.75/9,659.70 = 3,855.96/x
  3. Step 3: Cross multiply
    6,999.75x = 9,659.70 × 3,855.96
  4. Step 4: Simplify right side
    6,999.75x = 37,247,416.81
  5. Step 5: Solve for x
    x = 37,247,416.81/6,999.75
  6. Step 6: Final answer
    x = 5,321.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.