Home / 4,919.05-6,790.75-3,128.33

Finding the Fourth Proportional to 4,919.05, 6,790.75 and 3,128.33

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Solution

The fourth proportional to 4,919.05, 6,790.75 and 3,128.33 is: 4,318.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,919.05 : 6,790.75 = 3,128.33 : x
  2. Step 2: Convert to fraction form
    4,919.05/6,790.75 = 3,128.33/x
  3. Step 3: Cross multiply
    4,919.05x = 6,790.75 × 3,128.33
  4. Step 4: Simplify right side
    4,919.05x = 21,243,706.95
  5. Step 5: Solve for x
    x = 21,243,706.95/4,919.05
  6. Step 6: Final answer
    x = 4,318.66

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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.