Home / 2,015.75-2,781.73-1,131.56

Finding the Fourth Proportional to 2,015.75, 2,781.73 and 1,131.56

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Solution

The fourth proportional to 2,015.75, 2,781.73 and 1,131.56 is: 1,561.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.75 : 2,781.73 = 1,131.56 : x
  2. Step 2: Convert to fraction form
    2,015.75/2,781.73 = 1,131.56/x
  3. Step 3: Cross multiply
    2,015.75x = 2,781.73 × 1,131.56
  4. Step 4: Simplify right side
    2,015.75x = 3,147,677.66
  5. Step 5: Solve for x
    x = 3,147,677.66/2,015.75
  6. Step 6: Final answer
    x = 1,561.54

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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.