Home / 7,821.20-11,731.44-3,922.64

Finding the Fourth Proportional to 7,821.20, 11,731.44 and 3,922.64

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Solution

The fourth proportional to 7,821.20, 11,731.44 and 3,922.64 is: 5,883.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.20 : 11,731.44 = 3,922.64 : x
  2. Step 2: Convert to fraction form
    7,821.20/11,731.44 = 3,922.64/x
  3. Step 3: Cross multiply
    7,821.20x = 11,731.44 × 3,922.64
  4. Step 4: Simplify right side
    7,821.20x = 46,018,215.80
  5. Step 5: Solve for x
    x = 46,018,215.80/7,821.20
  6. Step 6: Final answer
    x = 5,883.78

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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.