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Finding the Fourth Proportional to 5,771.10, 8,659.20 and 2,807.90

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Solution

The fourth proportional to 5,771.10, 8,659.20 and 2,807.90 is: 4,213.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,771.10 : 8,659.20 = 2,807.90 : x
  2. Step 2: Convert to fraction form
    5,771.10/8,659.20 = 2,807.90/x
  3. Step 3: Cross multiply
    5,771.10x = 8,659.20 × 2,807.90
  4. Step 4: Simplify right side
    5,771.10x = 24,314,167.68
  5. Step 5: Solve for x
    x = 24,314,167.68/5,771.10
  6. Step 6: Final answer
    x = 4,213.09

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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.