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Finding the Fourth Proportional to 7,992.40, 11,980.48 and 3,826.30

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Solution

The fourth proportional to 7,992.40, 11,980.48 and 3,826.30 is: 5,735.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,992.40 : 11,980.48 = 3,826.30 : x
  2. Step 2: Convert to fraction form
    7,992.40/11,980.48 = 3,826.30/x
  3. Step 3: Cross multiply
    7,992.40x = 11,980.48 × 3,826.30
  4. Step 4: Simplify right side
    7,992.40x = 45,840,910.62
  5. Step 5: Solve for x
    x = 45,840,910.62/7,992.40
  6. Step 6: Final answer
    x = 5,735.56

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1.5x scale

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.