Home / 18,979.67-28,431.24-15,890.54

Finding the Fourth Proportional to 18,979.67, 28,431.24 and 15,890.54

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Solution

The fourth proportional to 18,979.67, 28,431.24 and 15,890.54 is: 23,803.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.67 : 28,431.24 = 15,890.54 : x
  2. Step 2: Convert to fraction form
    18,979.67/28,431.24 = 15,890.54/x
  3. Step 3: Cross multiply
    18,979.67x = 28,431.24 × 15,890.54
  4. Step 4: Simplify right side
    18,979.67x = 451,787,554.72
  5. Step 5: Solve for x
    x = 451,787,554.72/18,979.67
  6. Step 6: Final answer
    x = 23,803.76

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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.