Home / 18,579.12-27,868.14-5,431.80

Finding the Fourth Proportional to 18,579.12, 27,868.14 and 5,431.80

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Solution

The fourth proportional to 18,579.12, 27,868.14 and 5,431.80 is: 8,147.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,579.12 : 27,868.14 = 5,431.80 : x
  2. Step 2: Convert to fraction form
    18,579.12/27,868.14 = 5,431.80/x
  3. Step 3: Cross multiply
    18,579.12x = 27,868.14 × 5,431.80
  4. Step 4: Simplify right side
    18,579.12x = 151,374,162.85
  5. Step 5: Solve for x
    x = 151,374,162.85/18,579.12
  6. Step 6: Final answer
    x = 8,147.54

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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.