Home / 20,789.10-28,688.31-11,837.88

Finding the Fourth Proportional to 20,789.10, 28,688.31 and 11,837.88

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Solution

The fourth proportional to 20,789.10, 28,688.31 and 11,837.88 is: 16,335.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.10 : 28,688.31 = 11,837.88 : x
  2. Step 2: Convert to fraction form
    20,789.10/28,688.31 = 11,837.88/x
  3. Step 3: Cross multiply
    20,789.10x = 28,688.31 × 11,837.88
  4. Step 4: Simplify right side
    20,789.10x = 339,608,771.18
  5. Step 5: Solve for x
    x = 339,608,771.18/20,789.10
  6. Step 6: Final answer
    x = 16,335.91

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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.