Home / 12,279.86-18,409.37-4,379.99

Finding the Fourth Proportional to 12,279.86, 18,409.37 and 4,379.99

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Solution

The fourth proportional to 12,279.86, 18,409.37 and 4,379.99 is: 6,566.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.86 : 18,409.37 = 4,379.99 : x
  2. Step 2: Convert to fraction form
    12,279.86/18,409.37 = 4,379.99/x
  3. Step 3: Cross multiply
    12,279.86x = 18,409.37 × 4,379.99
  4. Step 4: Simplify right side
    12,279.86x = 80,632,742.56
  5. Step 5: Solve for x
    x = 80,632,742.56/12,279.86
  6. Step 6: Final answer
    x = 6,566.26

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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.