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Finding the Fourth Proportional to 6,639.88, 9,957.49 and 1,958.64

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Solution

The fourth proportional to 6,639.88, 9,957.49 and 1,958.64 is: 2,937.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.88 : 9,957.49 = 1,958.64 : x
  2. Step 2: Convert to fraction form
    6,639.88/9,957.49 = 1,958.64/x
  3. Step 3: Cross multiply
    6,639.88x = 9,957.49 × 1,958.64
  4. Step 4: Simplify right side
    6,639.88x = 19,503,138.21
  5. Step 5: Solve for x
    x = 19,503,138.21/6,639.88
  6. Step 6: Final answer
    x = 2,937.27

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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.