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Finding the Fourth Proportional to 18,671, 27,996.60 and 5,521.55

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Solution

The fourth proportional to 18,671, 27,996.60 and 5,521.55 is: 8,279.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671 : 27,996.60 = 5,521.55 : x
  2. Step 2: Convert to fraction form
    18,671/27,996.60 = 5,521.55/x
  3. Step 3: Cross multiply
    18,671x = 27,996.60 × 5,521.55
  4. Step 4: Simplify right side
    18,671x = 154,584,626.73
  5. Step 5: Solve for x
    x = 154,584,626.73/18,671
  6. Step 6: Final answer
    x = 8,279.40

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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.