Home / 2,128.28-3,187.56-1,914.44

Finding the Fourth Proportional to 2,128.28, 3,187.56 and 1,914.44

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Solution

The fourth proportional to 2,128.28, 3,187.56 and 1,914.44 is: 2,867.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.28 : 3,187.56 = 1,914.44 : x
  2. Step 2: Convert to fraction form
    2,128.28/3,187.56 = 1,914.44/x
  3. Step 3: Cross multiply
    2,128.28x = 3,187.56 × 1,914.44
  4. Step 4: Simplify right side
    2,128.28x = 6,102,392.37
  5. Step 5: Solve for x
    x = 6,102,392.37/2,128.28
  6. Step 6: Final answer
    x = 2,867.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.