Home / 20,128.27-30,189.68-7,651.44

Finding the Fourth Proportional to 20,128.27, 30,189.68 and 7,651.44

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Solution

The fourth proportional to 20,128.27, 30,189.68 and 7,651.44 is: 11,476.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.27 : 30,189.68 = 7,651.44 : x
  2. Step 2: Convert to fraction form
    20,128.27/30,189.68 = 7,651.44/x
  3. Step 3: Cross multiply
    20,128.27x = 30,189.68 × 7,651.44
  4. Step 4: Simplify right side
    20,128.27x = 230,994,525.14
  5. Step 5: Solve for x
    x = 230,994,525.14/20,128.27
  6. Step 6: Final answer
    x = 11,476.12

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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.