Home / 2,986.92-4,111.34-2,188.84

Finding the Fourth Proportional to 2,986.92, 4,111.34 and 2,188.84

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Solution

The fourth proportional to 2,986.92, 4,111.34 and 2,188.84 is: 3,012.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.92 : 4,111.34 = 2,188.84 : x
  2. Step 2: Convert to fraction form
    2,986.92/4,111.34 = 2,188.84/x
  3. Step 3: Cross multiply
    2,986.92x = 4,111.34 × 2,188.84
  4. Step 4: Simplify right side
    2,986.92x = 8,999,065.45
  5. Step 5: Solve for x
    x = 8,999,065.45/2,986.92
  6. Step 6: Final answer
    x = 3,012.82

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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.