Home / 12,379.50-18,571.30-6,139.71

Finding the Fourth Proportional to 12,379.50, 18,571.30 and 6,139.71

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Solution

The fourth proportional to 12,379.50, 18,571.30 and 6,139.71 is: 9,210.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,379.50 : 18,571.30 = 6,139.71 : x
  2. Step 2: Convert to fraction form
    12,379.50/18,571.30 = 6,139.71/x
  3. Step 3: Cross multiply
    12,379.50x = 18,571.30 × 6,139.71
  4. Step 4: Simplify right side
    12,379.50x = 114,022,412.05
  5. Step 5: Solve for x
    x = 114,022,412.05/12,379.50
  6. Step 6: Final answer
    x = 9,210.58

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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.