Home / 3,881.38-5,356.31-2,112.99

Finding the Fourth Proportional to 3,881.38, 5,356.31 and 2,112.99

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Solution

The fourth proportional to 3,881.38, 5,356.31 and 2,112.99 is: 2,915.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.38 : 5,356.31 = 2,112.99 : x
  2. Step 2: Convert to fraction form
    3,881.38/5,356.31 = 2,112.99/x
  3. Step 3: Cross multiply
    3,881.38x = 5,356.31 × 2,112.99
  4. Step 4: Simplify right side
    3,881.38x = 11,317,829.47
  5. Step 5: Solve for x
    x = 11,317,829.47/3,881.38
  6. Step 6: Final answer
    x = 2,915.93

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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.