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Finding the Fourth Proportional to 6,662.79, 9,990 and 3,540.87

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Solution

The fourth proportional to 6,662.79, 9,990 and 3,540.87 is: 5,309.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,662.79 : 9,990 = 3,540.87 : x
  2. Step 2: Convert to fraction form
    6,662.79/9,990 = 3,540.87/x
  3. Step 3: Cross multiply
    6,662.79x = 9,990 × 3,540.87
  4. Step 4: Simplify right side
    6,662.79x = 35,373,291.30
  5. Step 5: Solve for x
    x = 35,373,291.30/6,662.79
  6. Step 6: Final answer
    x = 5,309.08

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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.