Home / 8,118.38-12,169.19-3,119.40

Finding the Fourth Proportional to 8,118.38, 12,169.19 and 3,119.40

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Solution

The fourth proportional to 8,118.38, 12,169.19 and 3,119.40 is: 4,675.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.38 : 12,169.19 = 3,119.40 : x
  2. Step 2: Convert to fraction form
    8,118.38/12,169.19 = 3,119.40/x
  3. Step 3: Cross multiply
    8,118.38x = 12,169.19 × 3,119.40
  4. Step 4: Simplify right side
    8,118.38x = 37,960,579.08
  5. Step 5: Solve for x
    x = 37,960,579.08/8,118.38
  6. Step 6: Final answer
    x = 4,675.88

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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.