Home / 20,968.76-28,936.96-11,408.64

Finding the Fourth Proportional to 20,968.76, 28,936.96 and 11,408.64

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Solution

The fourth proportional to 20,968.76, 28,936.96 and 11,408.64 is: 15,743.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.76 : 28,936.96 = 11,408.64 : x
  2. Step 2: Convert to fraction form
    20,968.76/28,936.96 = 11,408.64/x
  3. Step 3: Cross multiply
    20,968.76x = 28,936.96 × 11,408.64
  4. Step 4: Simplify right side
    20,968.76x = 330,131,359.33
  5. Step 5: Solve for x
    x = 330,131,359.33/20,968.76
  6. Step 6: Final answer
    x = 15,743.96

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.