Home / 20,163.13-30,179.99-10,779.68

Finding the Fourth Proportional to 20,163.13, 30,179.99 and 10,779.68

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Solution

The fourth proportional to 20,163.13, 30,179.99 and 10,779.68 is: 16,134.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,163.13 : 30,179.99 = 10,779.68 : x
  2. Step 2: Convert to fraction form
    20,163.13/30,179.99 = 10,779.68/x
  3. Step 3: Cross multiply
    20,163.13x = 30,179.99 × 10,779.68
  4. Step 4: Simplify right side
    20,163.13x = 325,330,737.00
  5. Step 5: Solve for x
    x = 325,330,737.00/20,163.13
  6. Step 6: Final answer
    x = 16,134.93

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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.