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Finding the Fourth Proportional to 6,311.43, 8,709.31 and 3,658.79

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Solution

The fourth proportional to 6,311.43, 8,709.31 and 3,658.79 is: 5,048.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,311.43 : 8,709.31 = 3,658.79 : x
  2. Step 2: Convert to fraction form
    6,311.43/8,709.31 = 3,658.79/x
  3. Step 3: Cross multiply
    6,311.43x = 8,709.31 × 3,658.79
  4. Step 4: Simplify right side
    6,311.43x = 31,865,483.64
  5. Step 5: Solve for x
    x = 31,865,483.64/6,311.43
  6. Step 6: Final answer
    x = 5,048.85

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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.