Home / 7,894.20-11,819.43-3,990.45

Finding the Fourth Proportional to 7,894.20, 11,819.43 and 3,990.45

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Solution

The fourth proportional to 7,894.20, 11,819.43 and 3,990.45 is: 5,974.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,894.20 : 11,819.43 = 3,990.45 : x
  2. Step 2: Convert to fraction form
    7,894.20/11,819.43 = 3,990.45/x
  3. Step 3: Cross multiply
    7,894.20x = 11,819.43 × 3,990.45
  4. Step 4: Simplify right side
    7,894.20x = 47,164,844.44
  5. Step 5: Solve for x
    x = 47,164,844.44/7,894.20
  6. Step 6: Final answer
    x = 5,974.62

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1.5x scale

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.