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Finding the Fourth Proportional to 7,639.36, 11,441.92 and 6,639.36

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Solution

The fourth proportional to 7,639.36, 11,441.92 and 6,639.36 is: 9,944.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,639.36 : 11,441.92 = 6,639.36 : x
  2. Step 2: Convert to fraction form
    7,639.36/11,441.92 = 6,639.36/x
  3. Step 3: Cross multiply
    7,639.36x = 11,441.92 × 6,639.36
  4. Step 4: Simplify right side
    7,639.36x = 75,967,025.97
  5. Step 5: Solve for x
    x = 75,967,025.97/7,639.36
  6. Step 6: Final answer
    x = 9,944.16

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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.