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Finding the Fourth Proportional to 6,999.60, 9,659.34 and 3,855.90

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Solution

The fourth proportional to 6,999.60, 9,659.34 and 3,855.90 is: 5,321.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,999.60 : 9,659.34 = 3,855.90 : x
  2. Step 2: Convert to fraction form
    6,999.60/9,659.34 = 3,855.90/x
  3. Step 3: Cross multiply
    6,999.60x = 9,659.34 × 3,855.90
  4. Step 4: Simplify right side
    6,999.60x = 37,245,449.11
  5. Step 5: Solve for x
    x = 37,245,449.11/6,999.60
  6. Step 6: Final answer
    x = 5,321.08

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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.