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Finding the Fourth Proportional to 7,957.92, 11,936.08 and 2,115.12

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Solution

The fourth proportional to 7,957.92, 11,936.08 and 2,115.12 is: 3,172.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,957.92 : 11,936.08 = 2,115.12 : x
  2. Step 2: Convert to fraction form
    7,957.92/11,936.08 = 2,115.12/x
  3. Step 3: Cross multiply
    7,957.92x = 11,936.08 × 2,115.12
  4. Step 4: Simplify right side
    7,957.92x = 25,246,241.53
  5. Step 5: Solve for x
    x = 25,246,241.53/7,957.92
  6. Step 6: Final answer
    x = 3,172.47

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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.