Home / 3,918.51-5,407.07-2,868.75

Finding the Fourth Proportional to 3,918.51, 5,407.07 and 2,868.75

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Solution

The fourth proportional to 3,918.51, 5,407.07 and 2,868.75 is: 3,958.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.51 : 5,407.07 = 2,868.75 : x
  2. Step 2: Convert to fraction form
    3,918.51/5,407.07 = 2,868.75/x
  3. Step 3: Cross multiply
    3,918.51x = 5,407.07 × 2,868.75
  4. Step 4: Simplify right side
    3,918.51x = 15,511,517.72
  5. Step 5: Solve for x
    x = 15,511,517.72/3,918.51
  6. Step 6: Final answer
    x = 3,958.52

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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.