Home / 3,878.00-5,351.63-2,109.60

Finding the Fourth Proportional to 3,878.00, 5,351.63 and 2,109.60

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Solution

The fourth proportional to 3,878.00, 5,351.63 and 2,109.60 is: 2,911.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.00 : 5,351.63 = 2,109.60 : x
  2. Step 2: Convert to fraction form
    3,878.00/5,351.63 = 2,109.60/x
  3. Step 3: Cross multiply
    3,878.00x = 5,351.63 × 2,109.60
  4. Step 4: Simplify right side
    3,878.00x = 11,289,797.23
  5. Step 5: Solve for x
    x = 11,289,797.23/3,878.00
  6. Step 6: Final answer
    x = 2,911.24

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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.