Home / 3,968.70-5,469.93-2,640.12

Finding the Fourth Proportional to 3,968.70, 5,469.93 and 2,640.12

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Solution

The fourth proportional to 3,968.70, 5,469.93 and 2,640.12 is: 3,638.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,968.70 : 5,469.93 = 2,640.12 : x
  2. Step 2: Convert to fraction form
    3,968.70/5,469.93 = 2,640.12/x
  3. Step 3: Cross multiply
    3,968.70x = 5,469.93 × 2,640.12
  4. Step 4: Simplify right side
    3,968.70x = 14,441,271.59
  5. Step 5: Solve for x
    x = 14,441,271.59/3,968.70
  6. Step 6: Final answer
    x = 3,638.79

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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.