Home / 20,218.75-30,333.17-7,739.75

Finding the Fourth Proportional to 20,218.75, 30,333.17 and 7,739.75

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Solution

The fourth proportional to 20,218.75, 30,333.17 and 7,739.75 is: 11,611.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.75 : 30,333.17 = 7,739.75 : x
  2. Step 2: Convert to fraction form
    20,218.75/30,333.17 = 7,739.75/x
  3. Step 3: Cross multiply
    20,218.75x = 30,333.17 × 7,739.75
  4. Step 4: Simplify right side
    20,218.75x = 234,771,152.51
  5. Step 5: Solve for x
    x = 234,771,152.51/20,218.75
  6. Step 6: Final answer
    x = 11,611.56

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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.