Home / 8,128.44-12,189.96-3,196.80

Finding the Fourth Proportional to 8,128.44, 12,189.96 and 3,196.80

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Solution

The fourth proportional to 8,128.44, 12,189.96 and 3,196.80 is: 4,794.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.44 : 12,189.96 = 3,196.80 : x
  2. Step 2: Convert to fraction form
    8,128.44/12,189.96 = 3,196.80/x
  3. Step 3: Cross multiply
    8,128.44x = 12,189.96 × 3,196.80
  4. Step 4: Simplify right side
    8,128.44x = 38,968,864.13
  5. Step 5: Solve for x
    x = 38,968,864.13/8,128.44
  6. Step 6: Final answer
    x = 4,794.14

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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.