Home / 7,964.49-11,947.14-2,121.15

Finding the Fourth Proportional to 7,964.49, 11,947.14 and 2,121.15

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Solution

The fourth proportional to 7,964.49, 11,947.14 and 2,121.15 is: 3,181.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,964.49 : 11,947.14 = 2,121.15 : x
  2. Step 2: Convert to fraction form
    7,964.49/11,947.14 = 2,121.15/x
  3. Step 3: Cross multiply
    7,964.49x = 11,947.14 × 2,121.15
  4. Step 4: Simplify right side
    7,964.49x = 25,341,676.01
  5. Step 5: Solve for x
    x = 25,341,676.01/7,964.49
  6. Step 6: Final answer
    x = 3,181.83

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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.