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Finding the Fourth Proportional to 6,639.87, 9,958.26 and 1,960.20

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Solution

The fourth proportional to 6,639.87, 9,958.26 and 1,960.20 is: 2,939.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.87 : 9,958.26 = 1,960.20 : x
  2. Step 2: Convert to fraction form
    6,639.87/9,958.26 = 1,960.20/x
  3. Step 3: Cross multiply
    6,639.87x = 9,958.26 × 1,960.20
  4. Step 4: Simplify right side
    6,639.87x = 19,520,126.56
  5. Step 5: Solve for x
    x = 19,520,126.56/6,639.87
  6. Step 6: Final answer
    x = 2,939.84

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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.