Home / 2,817.62-3,883.65-2,117.78

Finding the Fourth Proportional to 2,817.62, 3,883.65 and 2,117.78

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Solution

The fourth proportional to 2,817.62, 3,883.65 and 2,117.78 is: 2,919.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.62 : 3,883.65 = 2,117.78 : x
  2. Step 2: Convert to fraction form
    2,817.62/3,883.65 = 2,117.78/x
  3. Step 3: Cross multiply
    2,817.62x = 3,883.65 × 2,117.78
  4. Step 4: Simplify right side
    2,817.62x = 8,224,716.30
  5. Step 5: Solve for x
    x = 8,224,716.30/2,817.62
  6. Step 6: Final answer
    x = 2,919.03

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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.