Home / 18,786.99-28,181.00-5,639.36

Finding the Fourth Proportional to 18,786.99, 28,181.00 and 5,639.36

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Solution

The fourth proportional to 18,786.99, 28,181.00 and 5,639.36 is: 8,459.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,786.99 : 28,181.00 = 5,639.36 : x
  2. Step 2: Convert to fraction form
    18,786.99/28,181.00 = 5,639.36/x
  3. Step 3: Cross multiply
    18,786.99x = 28,181.00 × 5,639.36
  4. Step 4: Simplify right side
    18,786.99x = 158,922,775.96
  5. Step 5: Solve for x
    x = 158,922,775.96/18,786.99
  6. Step 6: Final answer
    x = 8,459.19

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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.