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Finding the Fourth Proportional to 18,618.59, 27,919.09 and 6,764.10

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Solution

The fourth proportional to 18,618.59, 27,919.09 and 6,764.10 is: 10,142.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,618.59 : 27,919.09 = 6,764.10 : x
  2. Step 2: Convert to fraction form
    18,618.59/27,919.09 = 6,764.10/x
  3. Step 3: Cross multiply
    18,618.59x = 27,919.09 × 6,764.10
  4. Step 4: Simplify right side
    18,618.59x = 188,847,512.48
  5. Step 5: Solve for x
    x = 188,847,512.48/18,618.59
  6. Step 6: Final answer
    x = 10,142.95

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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.