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Finding the Fourth Proportional to 8,640.44, 11,919.54 and 5,497.64

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Solution

The fourth proportional to 8,640.44, 11,919.54 and 5,497.64 is: 7,584.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.44 : 11,919.54 = 5,497.64 : x
  2. Step 2: Convert to fraction form
    8,640.44/11,919.54 = 5,497.64/x
  3. Step 3: Cross multiply
    8,640.44x = 11,919.54 × 5,497.64
  4. Step 4: Simplify right side
    8,640.44x = 65,529,339.89
  5. Step 5: Solve for x
    x = 65,529,339.89/8,640.44
  6. Step 6: Final answer
    x = 7,584.03

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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.