Home / 3,918.44-5,407.78-2,150.40

Finding the Fourth Proportional to 3,918.44, 5,407.78 and 2,150.40

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Solution

The fourth proportional to 3,918.44, 5,407.78 and 2,150.40 is: 2,967.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.44 : 5,407.78 = 2,150.40 : x
  2. Step 2: Convert to fraction form
    3,918.44/5,407.78 = 2,150.40/x
  3. Step 3: Cross multiply
    3,918.44x = 5,407.78 × 2,150.40
  4. Step 4: Simplify right side
    3,918.44x = 11,628,890.11
  5. Step 5: Solve for x
    x = 11,628,890.11/3,918.44
  6. Step 6: Final answer
    x = 2,967.73

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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.