Home / 20,804.11-28,709.64-11,243.98

Finding the Fourth Proportional to 20,804.11, 28,709.64 and 11,243.98

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Solution

The fourth proportional to 20,804.11, 28,709.64 and 11,243.98 is: 15,516.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.11 : 28,709.64 = 11,243.98 : x
  2. Step 2: Convert to fraction form
    20,804.11/28,709.64 = 11,243.98/x
  3. Step 3: Cross multiply
    20,804.11x = 28,709.64 × 11,243.98
  4. Step 4: Simplify right side
    20,804.11x = 322,810,653.85
  5. Step 5: Solve for x
    x = 322,810,653.85/20,804.11
  6. Step 6: Final answer
    x = 15,516.68

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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.