Home / 3,881.02-5,355.70-2,112.60

Finding the Fourth Proportional to 3,881.02, 5,355.70 and 2,112.60

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Solution

The fourth proportional to 3,881.02, 5,355.70 and 2,112.60 is: 2,915.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.02 : 5,355.70 = 2,112.60 : x
  2. Step 2: Convert to fraction form
    3,881.02/5,355.70 = 2,112.60/x
  3. Step 3: Cross multiply
    3,881.02x = 5,355.70 × 2,112.60
  4. Step 4: Simplify right side
    3,881.02x = 11,314,451.82
  5. Step 5: Solve for x
    x = 11,314,451.82/3,881.02
  6. Step 6: Final answer
    x = 2,915.33

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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.