Home / 8,129.20-12,186.60-4,838.80

Finding the Fourth Proportional to 8,129.20, 12,186.60 and 4,838.80

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Solution

The fourth proportional to 8,129.20, 12,186.60 and 4,838.80 is: 7,253.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.20 : 12,186.60 = 4,838.80 : x
  2. Step 2: Convert to fraction form
    8,129.20/12,186.60 = 4,838.80/x
  3. Step 3: Cross multiply
    8,129.20x = 12,186.60 × 4,838.80
  4. Step 4: Simplify right side
    8,129.20x = 58,968,520.08
  5. Step 5: Solve for x
    x = 58,968,520.08/8,129.20
  6. Step 6: Final answer
    x = 7,253.91

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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.