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Finding the Fourth Proportional to 6,936.96, 9,639.36 and 6,865.92

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Solution

The fourth proportional to 6,936.96, 9,639.36 and 6,865.92 is: 9,540.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,936.96 : 9,639.36 = 6,865.92 : x
  2. Step 2: Convert to fraction form
    6,936.96/9,639.36 = 6,865.92/x
  3. Step 3: Cross multiply
    6,936.96x = 9,639.36 × 6,865.92
  4. Step 4: Simplify right side
    6,936.96x = 66,183,074.61
  5. Step 5: Solve for x
    x = 66,183,074.61/6,936.96
  6. Step 6: Final answer
    x = 9,540.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.