Home / 20,872.29-28,804.94-12,379.44

Finding the Fourth Proportional to 20,872.29, 28,804.94 and 12,379.44

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Solution

The fourth proportional to 20,872.29, 28,804.94 and 12,379.44 is: 17,084.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.29 : 28,804.94 = 12,379.44 : x
  2. Step 2: Convert to fraction form
    20,872.29/28,804.94 = 12,379.44/x
  3. Step 3: Cross multiply
    20,872.29x = 28,804.94 × 12,379.44
  4. Step 4: Simplify right side
    20,872.29x = 356,589,026.43
  5. Step 5: Solve for x
    x = 356,589,026.43/20,872.29
  6. Step 6: Final answer
    x = 17,084.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.