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Finding the Fourth Proportional to 7,369.92, 10,983.60 and 7,120.32

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Solution

The fourth proportional to 7,369.92, 10,983.60 and 7,120.32 is: 10,611.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,369.92 : 10,983.60 = 7,120.32 : x
  2. Step 2: Convert to fraction form
    7,369.92/10,983.60 = 7,120.32/x
  3. Step 3: Cross multiply
    7,369.92x = 10,983.60 × 7,120.32
  4. Step 4: Simplify right side
    7,369.92x = 78,206,746.75
  5. Step 5: Solve for x
    x = 78,206,746.75/7,369.92
  6. Step 6: Final answer
    x = 10,611.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.