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Finding the Fourth Proportional to 13,951.68, 20,924.28 and 5,190.72

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Solution

The fourth proportional to 13,951.68, 20,924.28 and 5,190.72 is: 7,784.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,951.68 : 20,924.28 = 5,190.72 : x
  2. Step 2: Convert to fraction form
    13,951.68/20,924.28 = 5,190.72/x
  3. Step 3: Cross multiply
    13,951.68x = 20,924.28 × 5,190.72
  4. Step 4: Simplify right side
    13,951.68x = 108,612,078.68
  5. Step 5: Solve for x
    x = 108,612,078.68/13,951.68
  6. Step 6: Final answer
    x = 7,784.87

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.