Home / 3,890.43-5,368.79-2,122.04

Finding the Fourth Proportional to 3,890.43, 5,368.79 and 2,122.04

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Solution

The fourth proportional to 3,890.43, 5,368.79 and 2,122.04 is: 2,928.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.43 : 5,368.79 = 2,122.04 : x
  2. Step 2: Convert to fraction form
    3,890.43/5,368.79 = 2,122.04/x
  3. Step 3: Cross multiply
    3,890.43x = 5,368.79 × 2,122.04
  4. Step 4: Simplify right side
    3,890.43x = 11,392,777.77
  5. Step 5: Solve for x
    x = 11,392,777.77/3,890.43
  6. Step 6: Final answer
    x = 2,928.41

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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.