Home / 3,904.78-5,388.60-2,136.40

Finding the Fourth Proportional to 3,904.78, 5,388.60 and 2,136.40

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Solution

The fourth proportional to 3,904.78, 5,388.60 and 2,136.40 is: 2,948.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.78 : 5,388.60 = 2,136.40 : x
  2. Step 2: Convert to fraction form
    3,904.78/5,388.60 = 2,136.40/x
  3. Step 3: Cross multiply
    3,904.78x = 5,388.60 × 2,136.40
  4. Step 4: Simplify right side
    3,904.78x = 11,512,205.04
  5. Step 5: Solve for x
    x = 11,512,205.04/3,904.78
  6. Step 6: Final answer
    x = 2,948.23

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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.