Home / 11,782.75-17,678.67-3,991.54

Finding the Fourth Proportional to 11,782.75, 17,678.67 and 3,991.54

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Solution

The fourth proportional to 11,782.75, 17,678.67 and 3,991.54 is: 5,988.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,782.75 : 17,678.67 = 3,991.54 : x
  2. Step 2: Convert to fraction form
    11,782.75/17,678.67 = 3,991.54/x
  3. Step 3: Cross multiply
    11,782.75x = 17,678.67 × 3,991.54
  4. Step 4: Simplify right side
    11,782.75x = 70,565,118.45
  5. Step 5: Solve for x
    x = 70,565,118.45/11,782.75
  6. Step 6: Final answer
    x = 5,988.85

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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.