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Finding the Fourth Proportional to 18,619.17, 27,919.99 and 6,764.61

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Solution

The fourth proportional to 18,619.17, 27,919.99 and 6,764.61 is: 10,143.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.17 : 27,919.99 = 6,764.61 : x
  2. Step 2: Convert to fraction form
    18,619.17/27,919.99 = 6,764.61/x
  3. Step 3: Cross multiply
    18,619.17x = 27,919.99 × 6,764.61
  4. Step 4: Simplify right side
    18,619.17x = 188,867,758.62
  5. Step 5: Solve for x
    x = 188,867,758.62/18,619.17
  6. Step 6: Final answer
    x = 10,143.72

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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.