Home / 8,119.16-12,178.20-3,189.64

Finding the Fourth Proportional to 8,119.16, 12,178.20 and 3,189.64

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Solution

The fourth proportional to 8,119.16, 12,178.20 and 3,189.64 is: 4,784.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.16 : 12,178.20 = 3,189.64 : x
  2. Step 2: Convert to fraction form
    8,119.16/12,178.20 = 3,189.64/x
  3. Step 3: Cross multiply
    8,119.16x = 12,178.20 × 3,189.64
  4. Step 4: Simplify right side
    8,119.16x = 38,844,073.85
  5. Step 5: Solve for x
    x = 38,844,073.85/8,119.16
  6. Step 6: Final answer
    x = 4,784.25

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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.