Home / 8,119.69-12,179.87-2,572.91

Finding the Fourth Proportional to 8,119.69, 12,179.87 and 2,572.91

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Solution

The fourth proportional to 8,119.69, 12,179.87 and 2,572.91 is: 3,859.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.69 : 12,179.87 = 2,572.91 : x
  2. Step 2: Convert to fraction form
    8,119.69/12,179.87 = 2,572.91/x
  3. Step 3: Cross multiply
    8,119.69x = 12,179.87 × 2,572.91
  4. Step 4: Simplify right side
    8,119.69x = 31,337,654.85
  5. Step 5: Solve for x
    x = 31,337,654.85/8,119.69
  6. Step 6: Final answer
    x = 3,859.47

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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.