Home / 20,190.48-30,287.72-7,720.99

Finding the Fourth Proportional to 20,190.48, 30,287.72 and 7,720.99

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Solution

The fourth proportional to 20,190.48, 30,287.72 and 7,720.99 is: 11,582.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.48 : 30,287.72 = 7,720.99 : x
  2. Step 2: Convert to fraction form
    20,190.48/30,287.72 = 7,720.99/x
  3. Step 3: Cross multiply
    20,190.48x = 30,287.72 × 7,720.99
  4. Step 4: Simplify right side
    20,190.48x = 233,851,183.24
  5. Step 5: Solve for x
    x = 233,851,183.24/20,190.48
  6. Step 6: Final answer
    x = 11,582.25

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1.5x scale

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.