Home / 2,015.84-2,781.92-1,131.68

Finding the Fourth Proportional to 2,015.84, 2,781.92 and 1,131.68

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Solution

The fourth proportional to 2,015.84, 2,781.92 and 1,131.68 is: 1,561.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.84 : 2,781.92 = 1,131.68 : x
  2. Step 2: Convert to fraction form
    2,015.84/2,781.92 = 1,131.68/x
  3. Step 3: Cross multiply
    2,015.84x = 2,781.92 × 1,131.68
  4. Step 4: Simplify right side
    2,015.84x = 3,148,223.66
  5. Step 5: Solve for x
    x = 3,148,223.66/2,015.84
  6. Step 6: Final answer
    x = 1,561.75

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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.