Home / 2,889.75-3,987.82-1,563.42

Finding the Fourth Proportional to 2,889.75, 3,987.82 and 1,563.42

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Solution

The fourth proportional to 2,889.75, 3,987.82 and 1,563.42 is: 2,157.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.75 : 3,987.82 = 1,563.42 : x
  2. Step 2: Convert to fraction form
    2,889.75/3,987.82 = 1,563.42/x
  3. Step 3: Cross multiply
    2,889.75x = 3,987.82 × 1,563.42
  4. Step 4: Simplify right side
    2,889.75x = 6,234,657.38
  5. Step 5: Solve for x
    x = 6,234,657.38/2,889.75
  6. Step 6: Final answer
    x = 2,157.51

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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.