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Finding the Fourth Proportional to 7,311.70, 10,979.70 and 4,027.15

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Solution

The fourth proportional to 7,311.70, 10,979.70 and 4,027.15 is: 6,047.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,311.70 : 10,979.70 = 4,027.15 : x
  2. Step 2: Convert to fraction form
    7,311.70/10,979.70 = 4,027.15/x
  3. Step 3: Cross multiply
    7,311.70x = 10,979.70 × 4,027.15
  4. Step 4: Simplify right side
    7,311.70x = 44,216,898.86
  5. Step 5: Solve for x
    x = 44,216,898.86/7,311.70
  6. Step 6: Final answer
    x = 6,047.42

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1.5x scale

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.