Home / 20,128.44-27,775.93-11,175.51

Finding the Fourth Proportional to 20,128.44, 27,775.93 and 11,175.51

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Solution

The fourth proportional to 20,128.44, 27,775.93 and 11,175.51 is: 15,421.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.44 : 27,775.93 = 11,175.51 : x
  2. Step 2: Convert to fraction form
    20,128.44/27,775.93 = 11,175.51/x
  3. Step 3: Cross multiply
    20,128.44x = 27,775.93 × 11,175.51
  4. Step 4: Simplify right side
    20,128.44x = 310,410,183.47
  5. Step 5: Solve for x
    x = 310,410,183.47/20,128.44
  6. Step 6: Final answer
    x = 15,421.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.