Home / 12,917.68-19,380.16-5,131.96

Finding the Fourth Proportional to 12,917.68, 19,380.16 and 5,131.96

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Solution

The fourth proportional to 12,917.68, 19,380.16 and 5,131.96 is: 7,699.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,917.68 : 19,380.16 = 5,131.96 : x
  2. Step 2: Convert to fraction form
    12,917.68/19,380.16 = 5,131.96/x
  3. Step 3: Cross multiply
    12,917.68x = 19,380.16 × 5,131.96
  4. Step 4: Simplify right side
    12,917.68x = 99,458,163.88
  5. Step 5: Solve for x
    x = 99,458,163.88/12,917.68
  6. Step 6: Final answer
    x = 7,699.38

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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.