Home / 7,961.90-11,942.87-2,118.51

Finding the Fourth Proportional to 7,961.90, 11,942.87 and 2,118.51

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Solution

The fourth proportional to 7,961.90, 11,942.87 and 2,118.51 is: 3,177.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.90 : 11,942.87 = 2,118.51 : x
  2. Step 2: Convert to fraction form
    7,961.90/11,942.87 = 2,118.51/x
  3. Step 3: Cross multiply
    7,961.90x = 11,942.87 × 2,118.51
  4. Step 4: Simplify right side
    7,961.90x = 25,301,089.52
  5. Step 5: Solve for x
    x = 25,301,089.52/7,961.90
  6. Step 6: Final answer
    x = 3,177.77

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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.