Home / 3,100.93-4,280.04-1,906.21

Finding the Fourth Proportional to 3,100.93, 4,280.04 and 1,906.21

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Solution

The fourth proportional to 3,100.93, 4,280.04 and 1,906.21 is: 2,631.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.93 : 4,280.04 = 1,906.21 : x
  2. Step 2: Convert to fraction form
    3,100.93/4,280.04 = 1,906.21/x
  3. Step 3: Cross multiply
    3,100.93x = 4,280.04 × 1,906.21
  4. Step 4: Simplify right side
    3,100.93x = 8,158,655.05
  5. Step 5: Solve for x
    x = 8,158,655.05/3,100.93
  6. Step 6: Final answer
    x = 2,631.03

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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.