Home / 8,629.32-11,900.55-6,396.75

Finding the Fourth Proportional to 8,629.32, 11,900.55 and 6,396.75

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Solution

The fourth proportional to 8,629.32, 11,900.55 and 6,396.75 is: 8,821.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,629.32 : 11,900.55 = 6,396.75 : x
  2. Step 2: Convert to fraction form
    8,629.32/11,900.55 = 6,396.75/x
  3. Step 3: Cross multiply
    8,629.32x = 11,900.55 × 6,396.75
  4. Step 4: Simplify right side
    8,629.32x = 76,124,843.21
  5. Step 5: Solve for x
    x = 76,124,843.21/8,629.32
  6. Step 6: Final answer
    x = 8,821.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.