Home / 18,786.23-28,172.86-5,455.61

Finding the Fourth Proportional to 18,786.23, 28,172.86 and 5,455.61

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Solution

The fourth proportional to 18,786.23, 28,172.86 and 5,455.61 is: 8,181.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,786.23 : 28,172.86 = 5,455.61 : x
  2. Step 2: Convert to fraction form
    18,786.23/28,172.86 = 5,455.61/x
  3. Step 3: Cross multiply
    18,786.23x = 28,172.86 × 5,455.61
  4. Step 4: Simplify right side
    18,786.23x = 153,700,136.74
  5. Step 5: Solve for x
    x = 153,700,136.74/18,786.23
  6. Step 6: Final answer
    x = 8,181.53

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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.