Home / 2,991.15-4,127.82-1,872.75

Finding the Fourth Proportional to 2,991.15, 4,127.82 and 1,872.75

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Solution

The fourth proportional to 2,991.15, 4,127.82 and 1,872.75 is: 2,584.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.15 : 4,127.82 = 1,872.75 : x
  2. Step 2: Convert to fraction form
    2,991.15/4,127.82 = 1,872.75/x
  3. Step 3: Cross multiply
    2,991.15x = 4,127.82 × 1,872.75
  4. Step 4: Simplify right side
    2,991.15x = 7,730,374.91
  5. Step 5: Solve for x
    x = 7,730,374.91/2,991.15
  6. Step 6: Final answer
    x = 2,584.42

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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.