Home / 3,161.07-4,361.07-1,980.09

Finding the Fourth Proportional to 3,161.07, 4,361.07 and 1,980.09

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Solution

The fourth proportional to 3,161.07, 4,361.07 and 1,980.09 is: 2,731.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.07 : 4,361.07 = 1,980.09 : x
  2. Step 2: Convert to fraction form
    3,161.07/4,361.07 = 1,980.09/x
  3. Step 3: Cross multiply
    3,161.07x = 4,361.07 × 1,980.09
  4. Step 4: Simplify right side
    3,161.07x = 8,635,311.10
  5. Step 5: Solve for x
    x = 8,635,311.10/3,161.07
  6. Step 6: Final answer
    x = 2,731.77

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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.