Home / 3,469.90-4,786.78-2,143.12

Finding the Fourth Proportional to 3,469.90, 4,786.78 and 2,143.12

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Solution

The fourth proportional to 3,469.90, 4,786.78 and 2,143.12 is: 2,956.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,469.90 : 4,786.78 = 2,143.12 : x
  2. Step 2: Convert to fraction form
    3,469.90/4,786.78 = 2,143.12/x
  3. Step 3: Cross multiply
    3,469.90x = 4,786.78 × 2,143.12
  4. Step 4: Simplify right side
    3,469.90x = 10,258,643.95
  5. Step 5: Solve for x
    x = 10,258,643.95/3,469.90
  6. Step 6: Final answer
    x = 2,956.47

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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.