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Finding the Fourth Proportional to 12,589.44, 18,874.08 and 8,433.60

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Solution

The fourth proportional to 12,589.44, 18,874.08 and 8,433.60 is: 12,643.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,589.44 : 18,874.08 = 8,433.60 : x
  2. Step 2: Convert to fraction form
    12,589.44/18,874.08 = 8,433.60/x
  3. Step 3: Cross multiply
    12,589.44x = 18,874.08 × 8,433.60
  4. Step 4: Simplify right side
    12,589.44x = 159,176,441.09
  5. Step 5: Solve for x
    x = 159,176,441.09/12,589.44
  6. Step 6: Final answer
    x = 12,643.65

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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.