Home / 3,890.75-5,369.40-2,122.37

Finding the Fourth Proportional to 3,890.75, 5,369.40 and 2,122.37

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Solution

The fourth proportional to 3,890.75, 5,369.40 and 2,122.37 is: 2,928.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.75 : 5,369.40 = 2,122.37 : x
  2. Step 2: Convert to fraction form
    3,890.75/5,369.40 = 2,122.37/x
  3. Step 3: Cross multiply
    3,890.75x = 5,369.40 × 2,122.37
  4. Step 4: Simplify right side
    3,890.75x = 11,395,846.77
  5. Step 5: Solve for x
    x = 11,395,846.77/3,890.75
  6. Step 6: Final answer
    x = 2,928.96

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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.