Home / 28,761.08-43,112.40-21,821

Finding the Fourth Proportional to 28,761.08, 43,112.40 and 21,821

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Solution

The fourth proportional to 28,761.08, 43,112.40 and 21,821 is: 32,709.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,761.08 : 43,112.40 = 21,821 : x
  2. Step 2: Convert to fraction form
    28,761.08/43,112.40 = 21,821/x
  3. Step 3: Cross multiply
    28,761.08x = 43,112.40 × 21,821
  4. Step 4: Simplify right side
    28,761.08x = 940,755,680.40
  5. Step 5: Solve for x
    x = 940,755,680.40/28,761.08
  6. Step 6: Final answer
    x = 32,709.33

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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.