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Finding the Fourth Proportional to 18,626.76, 27,940.20 and 5,479.44

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Solution

The fourth proportional to 18,626.76, 27,940.20 and 5,479.44 is: 8,219.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,626.76 : 27,940.20 = 5,479.44 : x
  2. Step 2: Convert to fraction form
    18,626.76/27,940.20 = 5,479.44/x
  3. Step 3: Cross multiply
    18,626.76x = 27,940.20 × 5,479.44
  4. Step 4: Simplify right side
    18,626.76x = 153,096,649.49
  5. Step 5: Solve for x
    x = 153,096,649.49/18,626.76
  6. Step 6: Final answer
    x = 8,219.18

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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.