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Finding the Fourth Proportional to 7,879.44, 11,811.72 and 2,681.76

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Solution

The fourth proportional to 7,879.44, 11,811.72 and 2,681.76 is: 4,020.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.44 : 11,811.72 = 2,681.76 : x
  2. Step 2: Convert to fraction form
    7,879.44/11,811.72 = 2,681.76/x
  3. Step 3: Cross multiply
    7,879.44x = 11,811.72 × 2,681.76
  4. Step 4: Simplify right side
    7,879.44x = 31,676,198.23
  5. Step 5: Solve for x
    x = 31,676,198.23/7,879.44
  6. Step 6: Final answer
    x = 4,020.11

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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.