Home / 1,933.12-2,686-1,912.78

Finding the Fourth Proportional to 1,933.12, 2,686 and 1,912.78

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Solution

The fourth proportional to 1,933.12, 2,686 and 1,912.78 is: 2,657.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,933.12 : 2,686 = 1,912.78 : x
  2. Step 2: Convert to fraction form
    1,933.12/2,686 = 1,912.78/x
  3. Step 3: Cross multiply
    1,933.12x = 2,686 × 1,912.78
  4. Step 4: Simplify right side
    1,933.12x = 5,137,727.08
  5. Step 5: Solve for x
    x = 5,137,727.08/1,933.12
  6. Step 6: Final answer
    x = 2,657.74

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.