Home / 3,904.95-5,388.60-2,136.21

Finding the Fourth Proportional to 3,904.95, 5,388.60 and 2,136.21

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Solution

The fourth proportional to 3,904.95, 5,388.60 and 2,136.21 is: 2,947.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.95 : 5,388.60 = 2,136.21 : x
  2. Step 2: Convert to fraction form
    3,904.95/5,388.60 = 2,136.21/x
  3. Step 3: Cross multiply
    3,904.95x = 5,388.60 × 2,136.21
  4. Step 4: Simplify right side
    3,904.95x = 11,511,181.21
  5. Step 5: Solve for x
    x = 11,511,181.21/3,904.95
  6. Step 6: Final answer
    x = 2,947.84

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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.