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Finding the Fourth Proportional to 18,486.64, 27,725.88 and 5,336.15

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Solution

The fourth proportional to 18,486.64, 27,725.88 and 5,336.15 is: 8,003.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.64 : 27,725.88 = 5,336.15 : x
  2. Step 2: Convert to fraction form
    18,486.64/27,725.88 = 5,336.15/x
  3. Step 3: Cross multiply
    18,486.64x = 27,725.88 × 5,336.15
  4. Step 4: Simplify right side
    18,486.64x = 147,949,454.56
  5. Step 5: Solve for x
    x = 147,949,454.56/18,486.64
  6. Step 6: Final answer
    x = 8,003.05

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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.