Home / 2,015.68-2,781.92-1,131.60

Finding the Fourth Proportional to 2,015.68, 2,781.92 and 1,131.60

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Solution

The fourth proportional to 2,015.68, 2,781.92 and 1,131.60 is: 1,561.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.68 : 2,781.92 = 1,131.60 : x
  2. Step 2: Convert to fraction form
    2,015.68/2,781.92 = 1,131.60/x
  3. Step 3: Cross multiply
    2,015.68x = 2,781.92 × 1,131.60
  4. Step 4: Simplify right side
    2,015.68x = 3,148,020.67
  5. Step 5: Solve for x
    x = 3,148,020.67/2,015.68
  6. Step 6: Final answer
    x = 1,561.77

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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.