Home / 3,890.66-5,369.09-2,122.25

Finding the Fourth Proportional to 3,890.66, 5,369.09 and 2,122.25

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Solution

The fourth proportional to 3,890.66, 5,369.09 and 2,122.25 is: 2,928.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.66 : 5,369.09 = 2,122.25 : x
  2. Step 2: Convert to fraction form
    3,890.66/5,369.09 = 2,122.25/x
  3. Step 3: Cross multiply
    3,890.66x = 5,369.09 × 2,122.25
  4. Step 4: Simplify right side
    3,890.66x = 11,394,513.80
  5. Step 5: Solve for x
    x = 11,394,513.80/3,890.66
  6. Step 6: Final answer
    x = 2,928.69

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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.