Home / 7,869.75-11,811.91-3,976.89

Finding the Fourth Proportional to 7,869.75, 11,811.91 and 3,976.89

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Solution

The fourth proportional to 7,869.75, 11,811.91 and 3,976.89 is: 5,969.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,869.75 : 11,811.91 = 3,976.89 : x
  2. Step 2: Convert to fraction form
    7,869.75/11,811.91 = 3,976.89/x
  3. Step 3: Cross multiply
    7,869.75x = 11,811.91 × 3,976.89
  4. Step 4: Simplify right side
    7,869.75x = 46,974,607.70
  5. Step 5: Solve for x
    x = 46,974,607.70/7,869.75
  6. Step 6: Final answer
    x = 5,969.01

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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.