Home / 20,828.89-31,245.93-6,790.33

Finding the Fourth Proportional to 20,828.89, 31,245.93 and 6,790.33

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Solution

The fourth proportional to 20,828.89, 31,245.93 and 6,790.33 is: 10,186.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.89 : 31,245.93 = 6,790.33 : x
  2. Step 2: Convert to fraction form
    20,828.89/31,245.93 = 6,790.33/x
  3. Step 3: Cross multiply
    20,828.89x = 31,245.93 × 6,790.33
  4. Step 4: Simplify right side
    20,828.89x = 212,170,097.74
  5. Step 5: Solve for x
    x = 212,170,097.74/20,828.89
  6. Step 6: Final answer
    x = 10,186.34

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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.