Home / 3,109.98-4,292.41-1,915.56

Finding the Fourth Proportional to 3,109.98, 4,292.41 and 1,915.56

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Solution

The fourth proportional to 3,109.98, 4,292.41 and 1,915.56 is: 2,643.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.98 : 4,292.41 = 1,915.56 : x
  2. Step 2: Convert to fraction form
    3,109.98/4,292.41 = 1,915.56/x
  3. Step 3: Cross multiply
    3,109.98x = 4,292.41 × 1,915.56
  4. Step 4: Simplify right side
    3,109.98x = 8,222,365.66
  5. Step 5: Solve for x
    x = 8,222,365.66/3,109.98
  6. Step 6: Final answer
    x = 2,643.86

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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.