Home / 5,115.42-7,669.44-1,992.78

Finding the Fourth Proportional to 5,115.42, 7,669.44 and 1,992.78

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Solution

The fourth proportional to 5,115.42, 7,669.44 and 1,992.78 is: 2,987.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.42 : 7,669.44 = 1,992.78 : x
  2. Step 2: Convert to fraction form
    5,115.42/7,669.44 = 1,992.78/x
  3. Step 3: Cross multiply
    5,115.42x = 7,669.44 × 1,992.78
  4. Step 4: Simplify right side
    5,115.42x = 15,283,506.64
  5. Step 5: Solve for x
    x = 15,283,506.64/5,115.42
  6. Step 6: Final answer
    x = 2,987.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.