Home / 3,883.78-5,359.70-2,115.38

Finding the Fourth Proportional to 3,883.78, 5,359.70 and 2,115.38

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Solution

The fourth proportional to 3,883.78, 5,359.70 and 2,115.38 is: 2,919.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,883.78 : 5,359.70 = 2,115.38 : x
  2. Step 2: Convert to fraction form
    3,883.78/5,359.70 = 2,115.38/x
  3. Step 3: Cross multiply
    3,883.78x = 5,359.70 × 2,115.38
  4. Step 4: Simplify right side
    3,883.78x = 11,337,802.19
  5. Step 5: Solve for x
    x = 11,337,802.19/3,883.78
  6. Step 6: Final answer
    x = 2,919.27

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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.