Home / 3,121.30-4,706.69-2,781.10

Finding the Fourth Proportional to 3,121.30, 4,706.69 and 2,781.10

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Solution

The fourth proportional to 3,121.30, 4,706.69 and 2,781.10 is: 4,193.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.30 : 4,706.69 = 2,781.10 : x
  2. Step 2: Convert to fraction form
    3,121.30/4,706.69 = 2,781.10/x
  3. Step 3: Cross multiply
    3,121.30x = 4,706.69 × 2,781.10
  4. Step 4: Simplify right side
    3,121.30x = 13,089,775.56
  5. Step 5: Solve for x
    x = 13,089,775.56/3,121.30
  6. Step 6: Final answer
    x = 4,193.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.