Home / 7,981.50-11,972.26-2,137.96

Finding the Fourth Proportional to 7,981.50, 11,972.26 and 2,137.96

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Solution

The fourth proportional to 7,981.50, 11,972.26 and 2,137.96 is: 3,206.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.50 : 11,972.26 = 2,137.96 : x
  2. Step 2: Convert to fraction form
    7,981.50/11,972.26 = 2,137.96/x
  3. Step 3: Cross multiply
    7,981.50x = 11,972.26 × 2,137.96
  4. Step 4: Simplify right side
    7,981.50x = 25,596,212.99
  5. Step 5: Solve for x
    x = 25,596,212.99/7,981.50
  6. Step 6: Final answer
    x = 3,206.94

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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.