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Finding the Fourth Proportional to 18,855.64, 28,286.92 and 6,206.12

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Solution

The fourth proportional to 18,855.64, 28,286.92 and 6,206.12 is: 9,310.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.64 : 28,286.92 = 6,206.12 : x
  2. Step 2: Convert to fraction form
    18,855.64/28,286.92 = 6,206.12/x
  3. Step 3: Cross multiply
    18,855.64x = 28,286.92 × 6,206.12
  4. Step 4: Simplify right side
    18,855.64x = 175,551,992.35
  5. Step 5: Solve for x
    x = 175,551,992.35/18,855.64
  6. Step 6: Final answer
    x = 9,310.32

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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.