Home / 28,920.11-43,379.82-11,390.09

Finding the Fourth Proportional to 28,920.11, 43,379.82 and 11,390.09

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Solution

The fourth proportional to 28,920.11, 43,379.82 and 11,390.09 is: 17,084.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.11 : 43,379.82 = 11,390.09 : x
  2. Step 2: Convert to fraction form
    28,920.11/43,379.82 = 11,390.09/x
  3. Step 3: Cross multiply
    28,920.11x = 43,379.82 × 11,390.09
  4. Step 4: Simplify right side
    28,920.11x = 494,099,837.08
  5. Step 5: Solve for x
    x = 494,099,837.08/28,920.11
  6. Step 6: Final answer
    x = 17,084.99

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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.