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Finding the Fourth Proportional to 6,639.30, 9,133.83 and 6,454.82

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Solution

The fourth proportional to 6,639.30, 9,133.83 and 6,454.82 is: 8,880.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.30 : 9,133.83 = 6,454.82 : x
  2. Step 2: Convert to fraction form
    6,639.30/9,133.83 = 6,454.82/x
  3. Step 3: Cross multiply
    6,639.30x = 9,133.83 × 6,454.82
  4. Step 4: Simplify right side
    6,639.30x = 58,957,251.40
  5. Step 5: Solve for x
    x = 58,957,251.40/6,639.30
  6. Step 6: Final answer
    x = 8,880.04

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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.