Home / 2,987.54-4,109.10-2,396.78

Finding the Fourth Proportional to 2,987.54, 4,109.10 and 2,396.78

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Solution

The fourth proportional to 2,987.54, 4,109.10 and 2,396.78 is: 3,296.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.54 : 4,109.10 = 2,396.78 : x
  2. Step 2: Convert to fraction form
    2,987.54/4,109.10 = 2,396.78/x
  3. Step 3: Cross multiply
    2,987.54x = 4,109.10 × 2,396.78
  4. Step 4: Simplify right side
    2,987.54x = 9,848,608.70
  5. Step 5: Solve for x
    x = 9,848,608.70/2,987.54
  6. Step 6: Final answer
    x = 3,296.56

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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.