Home / 7,981.05-11,977.04-2,786.93

Finding the Fourth Proportional to 7,981.05, 11,977.04 and 2,786.93

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Solution

The fourth proportional to 7,981.05, 11,977.04 and 2,786.93 is: 4,182.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.05 : 11,977.04 = 2,786.93 : x
  2. Step 2: Convert to fraction form
    7,981.05/11,977.04 = 2,786.93/x
  3. Step 3: Cross multiply
    7,981.05x = 11,977.04 × 2,786.93
  4. Step 4: Simplify right side
    7,981.05x = 33,379,172.09
  5. Step 5: Solve for x
    x = 33,379,172.09/7,981.05
  6. Step 6: Final answer
    x = 4,182.30

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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.