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Finding the Fourth Proportional to 6,629.64, 9,940.86 and 4,289.32

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Solution

The fourth proportional to 6,629.64, 9,940.86 and 4,289.32 is: 6,431.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,629.64 : 9,940.86 = 4,289.32 : x
  2. Step 2: Convert to fraction form
    6,629.64/9,940.86 = 4,289.32/x
  3. Step 3: Cross multiply
    6,629.64x = 9,940.86 × 4,289.32
  4. Step 4: Simplify right side
    6,629.64x = 42,639,529.62
  5. Step 5: Solve for x
    x = 42,639,529.62/6,629.64
  6. Step 6: Final answer
    x = 6,431.65

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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.