Home / 20,804.56-28,709.32-11,371.28

Finding the Fourth Proportional to 20,804.56, 28,709.32 and 11,371.28

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Solution

The fourth proportional to 20,804.56, 28,709.32 and 11,371.28 is: 15,691.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.56 : 28,709.32 = 11,371.28 : x
  2. Step 2: Convert to fraction form
    20,804.56/28,709.32 = 11,371.28/x
  3. Step 3: Cross multiply
    20,804.56x = 28,709.32 × 11,371.28
  4. Step 4: Simplify right side
    20,804.56x = 326,461,716.33
  5. Step 5: Solve for x
    x = 326,461,716.33/20,804.56
  6. Step 6: Final answer
    x = 15,691.83

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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.