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Finding the Fourth Proportional to 6,479.11, 9,720.11 and 1,861.75

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Solution

The fourth proportional to 6,479.11, 9,720.11 and 1,861.75 is: 2,793.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.11 : 9,720.11 = 1,861.75 : x
  2. Step 2: Convert to fraction form
    6,479.11/9,720.11 = 1,861.75/x
  3. Step 3: Cross multiply
    6,479.11x = 9,720.11 × 1,861.75
  4. Step 4: Simplify right side
    6,479.11x = 18,096,405.48
  5. Step 5: Solve for x
    x = 18,096,405.48/6,479.11
  6. Step 6: Final answer
    x = 2,793.04

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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.