Home / 8,919.89-13,379.32-2,679.77

Finding the Fourth Proportional to 8,919.89, 13,379.32 and 2,679.77

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Solution

The fourth proportional to 8,919.89, 13,379.32 and 2,679.77 is: 4,019.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.89 : 13,379.32 = 2,679.77 : x
  2. Step 2: Convert to fraction form
    8,919.89/13,379.32 = 2,679.77/x
  3. Step 3: Cross multiply
    8,919.89x = 13,379.32 × 2,679.77
  4. Step 4: Simplify right side
    8,919.89x = 35,853,486.98
  5. Step 5: Solve for x
    x = 35,853,486.98/8,919.89
  6. Step 6: Final answer
    x = 4,019.50

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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.