Home / 3,109.54-4,290.91-1,975.12

Finding the Fourth Proportional to 3,109.54, 4,290.91 and 1,975.12

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Solution

The fourth proportional to 3,109.54, 4,290.91 and 1,975.12 is: 2,725.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.54 : 4,290.91 = 1,975.12 : x
  2. Step 2: Convert to fraction form
    3,109.54/4,290.91 = 1,975.12/x
  3. Step 3: Cross multiply
    3,109.54x = 4,290.91 × 1,975.12
  4. Step 4: Simplify right side
    3,109.54x = 8,475,040.70
  5. Step 5: Solve for x
    x = 8,475,040.70/3,109.54
  6. Step 6: Final answer
    x = 2,725.50

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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.