Home / 3,106.13-4,285.86-1,986.21

Finding the Fourth Proportional to 3,106.13, 4,285.86 and 1,986.21

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Solution

The fourth proportional to 3,106.13, 4,285.86 and 1,986.21 is: 2,740.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.13 : 4,285.86 = 1,986.21 : x
  2. Step 2: Convert to fraction form
    3,106.13/4,285.86 = 1,986.21/x
  3. Step 3: Cross multiply
    3,106.13x = 4,285.86 × 1,986.21
  4. Step 4: Simplify right side
    3,106.13x = 8,512,617.99
  5. Step 5: Solve for x
    x = 8,512,617.99/3,106.13
  6. Step 6: Final answer
    x = 2,740.59

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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.