Home / 2,918.36-4,028.46-2,138.60

Finding the Fourth Proportional to 2,918.36, 4,028.46 and 2,138.60

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Solution

The fourth proportional to 2,918.36, 4,028.46 and 2,138.60 is: 2,952.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.36 : 4,028.46 = 2,138.60 : x
  2. Step 2: Convert to fraction form
    2,918.36/4,028.46 = 2,138.60/x
  3. Step 3: Cross multiply
    2,918.36x = 4,028.46 × 2,138.60
  4. Step 4: Simplify right side
    2,918.36x = 8,615,264.56
  5. Step 5: Solve for x
    x = 8,615,264.56/2,918.36
  6. Step 6: Final answer
    x = 2,952.09

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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.