Home / 3,639.89-5,435.15-2,891.09

Finding the Fourth Proportional to 3,639.89, 5,435.15 and 2,891.09

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Solution

The fourth proportional to 3,639.89, 5,435.15 and 2,891.09 is: 4,317.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.89 : 5,435.15 = 2,891.09 : x
  2. Step 2: Convert to fraction form
    3,639.89/5,435.15 = 2,891.09/x
  3. Step 3: Cross multiply
    3,639.89x = 5,435.15 × 2,891.09
  4. Step 4: Simplify right side
    3,639.89x = 15,713,466.18
  5. Step 5: Solve for x
    x = 15,713,466.18/3,639.89
  6. Step 6: Final answer
    x = 4,317.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.