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Finding the Fourth Proportional to 7,963.92, 10,990.12 and 4,427.44

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Solution

The fourth proportional to 7,963.92, 10,990.12 and 4,427.44 is: 6,109.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,963.92 : 10,990.12 = 4,427.44 : x
  2. Step 2: Convert to fraction form
    7,963.92/10,990.12 = 4,427.44/x
  3. Step 3: Cross multiply
    7,963.92x = 10,990.12 × 4,427.44
  4. Step 4: Simplify right side
    7,963.92x = 48,658,096.89
  5. Step 5: Solve for x
    x = 48,658,096.89/7,963.92
  6. Step 6: Final answer
    x = 6,109.82

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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.