Home / 12,439.91-18,659.83-4,119.94

Finding the Fourth Proportional to 12,439.91, 18,659.83 and 4,119.94

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Solution

The fourth proportional to 12,439.91, 18,659.83 and 4,119.94 is: 6,179.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.91 : 18,659.83 = 4,119.94 : x
  2. Step 2: Convert to fraction form
    12,439.91/18,659.83 = 4,119.94/x
  3. Step 3: Cross multiply
    12,439.91x = 18,659.83 × 4,119.94
  4. Step 4: Simplify right side
    12,439.91x = 76,877,286.71
  5. Step 5: Solve for x
    x = 76,877,286.71/12,439.91
  6. Step 6: Final answer
    x = 6,179.89

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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.