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Finding the Fourth Proportional to 12,641.91, 18,956.62 and 3,874.71

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Solution

The fourth proportional to 12,641.91, 18,956.62 and 3,874.71 is: 5,810.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.91 : 18,956.62 = 3,874.71 : x
  2. Step 2: Convert to fraction form
    12,641.91/18,956.62 = 3,874.71/x
  3. Step 3: Cross multiply
    12,641.91x = 18,956.62 × 3,874.71
  4. Step 4: Simplify right side
    12,641.91x = 73,451,405.08
  5. Step 5: Solve for x
    x = 73,451,405.08/12,641.91
  6. Step 6: Final answer
    x = 5,810.15

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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.