Home / 3,121.42-4,307.54-1,863.29

Finding the Fourth Proportional to 3,121.42, 4,307.54 and 1,863.29

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Solution

The fourth proportional to 3,121.42, 4,307.54 and 1,863.29 is: 2,571.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.42 : 4,307.54 = 1,863.29 : x
  2. Step 2: Convert to fraction form
    3,121.42/4,307.54 = 1,863.29/x
  3. Step 3: Cross multiply
    3,121.42x = 4,307.54 × 1,863.29
  4. Step 4: Simplify right side
    3,121.42x = 8,026,196.21
  5. Step 5: Solve for x
    x = 8,026,196.21/3,121.42
  6. Step 6: Final answer
    x = 2,571.33

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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.