Home / 3,890.79-5,369.30-2,122.53

Finding the Fourth Proportional to 3,890.79, 5,369.30 and 2,122.53

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Solution

The fourth proportional to 3,890.79, 5,369.30 and 2,122.53 is: 2,929.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.79 : 5,369.30 = 2,122.53 : x
  2. Step 2: Convert to fraction form
    3,890.79/5,369.30 = 2,122.53/x
  3. Step 3: Cross multiply
    3,890.79x = 5,369.30 × 2,122.53
  4. Step 4: Simplify right side
    3,890.79x = 11,396,489.72
  5. Step 5: Solve for x
    x = 11,396,489.72/3,890.79
  6. Step 6: Final answer
    x = 2,929.09

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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.