Home / 2,986.20-4,120.38-2,040.93

Finding the Fourth Proportional to 2,986.20, 4,120.38 and 2,040.93

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Solution

The fourth proportional to 2,986.20, 4,120.38 and 2,040.93 is: 2,816.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.20 : 4,120.38 = 2,040.93 : x
  2. Step 2: Convert to fraction form
    2,986.20/4,120.38 = 2,040.93/x
  3. Step 3: Cross multiply
    2,986.20x = 4,120.38 × 2,040.93
  4. Step 4: Simplify right side
    2,986.20x = 8,409,407.15
  5. Step 5: Solve for x
    x = 8,409,407.15/2,986.20
  6. Step 6: Final answer
    x = 2,816.09

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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.