Home / 2,917.80-4,025.94-2,817.78

Finding the Fourth Proportional to 2,917.80, 4,025.94 and 2,817.78

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Solution

The fourth proportional to 2,917.80, 4,025.94 and 2,817.78 is: 3,887.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,917.80 : 4,025.94 = 2,817.78 : x
  2. Step 2: Convert to fraction form
    2,917.80/4,025.94 = 2,817.78/x
  3. Step 3: Cross multiply
    2,917.80x = 4,025.94 × 2,817.78
  4. Step 4: Simplify right side
    2,917.80x = 11,344,213.21
  5. Step 5: Solve for x
    x = 11,344,213.21/2,917.80
  6. Step 6: Final answer
    x = 3,887.93

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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.