Home / 28,390.38-39,183.39-15,819.18

Finding the Fourth Proportional to 28,390.38, 39,183.39 and 15,819.18

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Solution

The fourth proportional to 28,390.38, 39,183.39 and 15,819.18 is: 21,833.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,390.38 : 39,183.39 = 15,819.18 : x
  2. Step 2: Convert to fraction form
    28,390.38/39,183.39 = 15,819.18/x
  3. Step 3: Cross multiply
    28,390.38x = 39,183.39 × 15,819.18
  4. Step 4: Simplify right side
    28,390.38x = 619,849,099.42
  5. Step 5: Solve for x
    x = 619,849,099.42/28,390.38
  6. Step 6: Final answer
    x = 21,833.07

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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.