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Finding the Fourth Proportional to 7,930.20, 11,891.70 and 2,998.20

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Solution

The fourth proportional to 7,930.20, 11,891.70 and 2,998.20 is: 4,495.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,930.20 : 11,891.70 = 2,998.20 : x
  2. Step 2: Convert to fraction form
    7,930.20/11,891.70 = 2,998.20/x
  3. Step 3: Cross multiply
    7,930.20x = 11,891.70 × 2,998.20
  4. Step 4: Simplify right side
    7,930.20x = 35,653,694.94
  5. Step 5: Solve for x
    x = 35,653,694.94/7,930.20
  6. Step 6: Final answer
    x = 4,495.94

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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.