Home / 7,821.45-11,735.87-3,928.59

Finding the Fourth Proportional to 7,821.45, 11,735.87 and 3,928.59

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Solution

The fourth proportional to 7,821.45, 11,735.87 and 3,928.59 is: 5,894.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.45 : 11,735.87 = 3,928.59 : x
  2. Step 2: Convert to fraction form
    7,821.45/11,735.87 = 3,928.59/x
  3. Step 3: Cross multiply
    7,821.45x = 11,735.87 × 3,928.59
  4. Step 4: Simplify right side
    7,821.45x = 46,105,401.88
  5. Step 5: Solve for x
    x = 46,105,401.88/7,821.45
  6. Step 6: Final answer
    x = 5,894.74

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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.