Home / 3,107.49-4,289.04-2,115.15

Finding the Fourth Proportional to 3,107.49, 4,289.04 and 2,115.15

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Solution

The fourth proportional to 3,107.49, 4,289.04 and 2,115.15 is: 2,919.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.49 : 4,289.04 = 2,115.15 : x
  2. Step 2: Convert to fraction form
    3,107.49/4,289.04 = 2,115.15/x
  3. Step 3: Cross multiply
    3,107.49x = 4,289.04 × 2,115.15
  4. Step 4: Simplify right side
    3,107.49x = 9,071,962.96
  5. Step 5: Solve for x
    x = 9,071,962.96/3,107.49
  6. Step 6: Final answer
    x = 2,919.39

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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.