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Finding the Fourth Proportional to 8,511.44, 12,740.44 and 5,380.64

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Solution

The fourth proportional to 8,511.44, 12,740.44 and 5,380.64 is: 8,054.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,511.44 : 12,740.44 = 5,380.64 : x
  2. Step 2: Convert to fraction form
    8,511.44/12,740.44 = 5,380.64/x
  3. Step 3: Cross multiply
    8,511.44x = 12,740.44 × 5,380.64
  4. Step 4: Simplify right side
    8,511.44x = 68,551,721.08
  5. Step 5: Solve for x
    x = 68,551,721.08/8,511.44
  6. Step 6: Final answer
    x = 8,054.07

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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.