Home / 3,918.56-5,407.68-2,150.28

Finding the Fourth Proportional to 3,918.56, 5,407.68 and 2,150.28

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Solution

The fourth proportional to 3,918.56, 5,407.68 and 2,150.28 is: 2,967.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.56 : 5,407.68 = 2,150.28 : x
  2. Step 2: Convert to fraction form
    3,918.56/5,407.68 = 2,150.28/x
  3. Step 3: Cross multiply
    3,918.56x = 5,407.68 × 2,150.28
  4. Step 4: Simplify right side
    3,918.56x = 11,628,026.15
  5. Step 5: Solve for x
    x = 11,628,026.15/3,918.56
  6. Step 6: Final answer
    x = 2,967.42

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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.