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Finding the Fourth Proportional to 7,951.17, 11,928.56 and 4,251.45

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Solution

The fourth proportional to 7,951.17, 11,928.56 and 4,251.45 is: 6,378.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,951.17 : 11,928.56 = 4,251.45 : x
  2. Step 2: Convert to fraction form
    7,951.17/11,928.56 = 4,251.45/x
  3. Step 3: Cross multiply
    7,951.17x = 11,928.56 × 4,251.45
  4. Step 4: Simplify right side
    7,951.17x = 50,713,676.41
  5. Step 5: Solve for x
    x = 50,713,676.41/7,951.17
  6. Step 6: Final answer
    x = 6,378.14

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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.