Home / 18,815.64-28,198.70-10,499.57

Finding the Fourth Proportional to 18,815.64, 28,198.70 and 10,499.57

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Solution

The fourth proportional to 18,815.64, 28,198.70 and 10,499.57 is: 15,735.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.64 : 28,198.70 = 10,499.57 : x
  2. Step 2: Convert to fraction form
    18,815.64/28,198.70 = 10,499.57/x
  3. Step 3: Cross multiply
    18,815.64x = 28,198.70 × 10,499.57
  4. Step 4: Simplify right side
    18,815.64x = 296,074,224.56
  5. Step 5: Solve for x
    x = 296,074,224.56/18,815.64
  6. Step 6: Final answer
    x = 15,735.54

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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.