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Finding the Fourth Proportional to 8,120.16, 12,179.44 and 5,504.47

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Solution

The fourth proportional to 8,120.16, 12,179.44 and 5,504.47 is: 8,256.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.16 : 12,179.44 = 5,504.47 : x
  2. Step 2: Convert to fraction form
    8,120.16/12,179.44 = 5,504.47/x
  3. Step 3: Cross multiply
    8,120.16x = 12,179.44 × 5,504.47
  4. Step 4: Simplify right side
    8,120.16x = 67,041,375.86
  5. Step 5: Solve for x
    x = 67,041,375.86/8,120.16
  6. Step 6: Final answer
    x = 8,256.16

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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.