Home / 3,785.31-5,215.21-2,839.63

Finding the Fourth Proportional to 3,785.31, 5,215.21 and 2,839.63

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Solution

The fourth proportional to 3,785.31, 5,215.21 and 2,839.63 is: 3,912.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,785.31 : 5,215.21 = 2,839.63 : x
  2. Step 2: Convert to fraction form
    3,785.31/5,215.21 = 2,839.63/x
  3. Step 3: Cross multiply
    3,785.31x = 5,215.21 × 2,839.63
  4. Step 4: Simplify right side
    3,785.31x = 14,809,266.77
  5. Step 5: Solve for x
    x = 14,809,266.77/3,785.31
  6. Step 6: Final answer
    x = 3,912.30

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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.