Home / 2,912.12-4,016.69-2,815.70

Finding the Fourth Proportional to 2,912.12, 4,016.69 and 2,815.70

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Solution

The fourth proportional to 2,912.12, 4,016.69 and 2,815.70 is: 3,883.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.12 : 4,016.69 = 2,815.70 : x
  2. Step 2: Convert to fraction form
    2,912.12/4,016.69 = 2,815.70/x
  3. Step 3: Cross multiply
    2,912.12x = 4,016.69 × 2,815.70
  4. Step 4: Simplify right side
    2,912.12x = 11,309,770.43
  5. Step 5: Solve for x
    x = 11,309,770.43/2,912.12
  6. Step 6: Final answer
    x = 3,883.69

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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.