Home / 3,157.29-4,361.48-2,991.21

Finding the Fourth Proportional to 3,157.29, 4,361.48 and 2,991.21

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Solution

The fourth proportional to 3,157.29, 4,361.48 and 2,991.21 is: 4,132.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,157.29 : 4,361.48 = 2,991.21 : x
  2. Step 2: Convert to fraction form
    3,157.29/4,361.48 = 2,991.21/x
  3. Step 3: Cross multiply
    3,157.29x = 4,361.48 × 2,991.21
  4. Step 4: Simplify right side
    3,157.29x = 13,046,087.63
  5. Step 5: Solve for x
    x = 13,046,087.63/3,157.29
  6. Step 6: Final answer
    x = 4,132.05

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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.