Home / 8,128.40-12,198.96-4,179.48

Finding the Fourth Proportional to 8,128.40, 12,198.96 and 4,179.48

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Solution

The fourth proportional to 8,128.40, 12,198.96 and 4,179.48 is: 6,272.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.40 : 12,198.96 = 4,179.48 : x
  2. Step 2: Convert to fraction form
    8,128.40/12,198.96 = 4,179.48/x
  3. Step 3: Cross multiply
    8,128.40x = 12,198.96 × 4,179.48
  4. Step 4: Simplify right side
    8,128.40x = 50,985,309.34
  5. Step 5: Solve for x
    x = 50,985,309.34/8,128.40
  6. Step 6: Final answer
    x = 6,272.49

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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.