Home / 20,189.48-30,286.22-7,719.99

Finding the Fourth Proportional to 20,189.48, 30,286.22 and 7,719.99

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Solution

The fourth proportional to 20,189.48, 30,286.22 and 7,719.99 is: 11,580.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189.48 : 30,286.22 = 7,719.99 : x
  2. Step 2: Convert to fraction form
    20,189.48/30,286.22 = 7,719.99/x
  3. Step 3: Cross multiply
    20,189.48x = 30,286.22 × 7,719.99
  4. Step 4: Simplify right side
    20,189.48x = 233,809,276.94
  5. Step 5: Solve for x
    x = 233,809,276.94/20,189.48
  6. Step 6: Final answer
    x = 11,580.75

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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.