Home / 20,939.58-31,409.64-11,578.14

Finding the Fourth Proportional to 20,939.58, 31,409.64 and 11,578.14

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Solution

The fourth proportional to 20,939.58, 31,409.64 and 11,578.14 is: 17,367.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.58 : 31,409.64 = 11,578.14 : x
  2. Step 2: Convert to fraction form
    20,939.58/31,409.64 = 11,578.14/x
  3. Step 3: Cross multiply
    20,939.58x = 31,409.64 × 11,578.14
  4. Step 4: Simplify right side
    20,939.58x = 363,665,209.27
  5. Step 5: Solve for x
    x = 363,665,209.27/20,939.58
  6. Step 6: Final answer
    x = 17,367.36

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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.