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Finding the Fourth Proportional to 20,756.88, 28,644.40 and 11,325.44

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Solution

The fourth proportional to 20,756.88, 28,644.40 and 11,325.44 is: 15,629.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.88 : 28,644.40 = 11,325.44 : x
  2. Step 2: Convert to fraction form
    20,756.88/28,644.40 = 11,325.44/x
  3. Step 3: Cross multiply
    20,756.88x = 28,644.40 × 11,325.44
  4. Step 4: Simplify right side
    20,756.88x = 324,410,433.54
  5. Step 5: Solve for x
    x = 324,410,433.54/20,756.88
  6. Step 6: Final answer
    x = 15,629.06

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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.