Home / 18,786.74-28,180.62-5,639.11

Finding the Fourth Proportional to 18,786.74, 28,180.62 and 5,639.11

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Solution

The fourth proportional to 18,786.74, 28,180.62 and 5,639.11 is: 8,458.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,786.74 : 28,180.62 = 5,639.11 : x
  2. Step 2: Convert to fraction form
    18,786.74/28,180.62 = 5,639.11/x
  3. Step 3: Cross multiply
    18,786.74x = 28,180.62 × 5,639.11
  4. Step 4: Simplify right side
    18,786.74x = 158,913,651.27
  5. Step 5: Solve for x
    x = 158,913,651.27/18,786.74
  6. Step 6: Final answer
    x = 8,458.82

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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.