Home / 11,175.78-15,425.12-7,399.09

Finding the Fourth Proportional to 11,175.78, 15,425.12 and 7,399.09

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Solution

The fourth proportional to 11,175.78, 15,425.12 and 7,399.09 is: 10,212.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,175.78 : 15,425.12 = 7,399.09 : x
  2. Step 2: Convert to fraction form
    11,175.78/15,425.12 = 7,399.09/x
  3. Step 3: Cross multiply
    11,175.78x = 15,425.12 × 7,399.09
  4. Step 4: Simplify right side
    11,175.78x = 114,131,851.14
  5. Step 5: Solve for x
    x = 114,131,851.14/11,175.78
  6. Step 6: Final answer
    x = 10,212.43

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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.