Home / 20,410.56-28,168.20-11,458.65

Finding the Fourth Proportional to 20,410.56, 28,168.20 and 11,458.65

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Solution

The fourth proportional to 20,410.56, 28,168.20 and 11,458.65 is: 15,813.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,410.56 : 28,168.20 = 11,458.65 : x
  2. Step 2: Convert to fraction form
    20,410.56/28,168.20 = 11,458.65/x
  3. Step 3: Cross multiply
    20,410.56x = 28,168.20 × 11,458.65
  4. Step 4: Simplify right side
    20,410.56x = 322,769,544.93
  5. Step 5: Solve for x
    x = 322,769,544.93/20,410.56
  6. Step 6: Final answer
    x = 15,813.85

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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.