Home / 13,162.78-19,660.11-11,911.43

Finding the Fourth Proportional to 13,162.78, 19,660.11 and 11,911.43

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Solution

The fourth proportional to 13,162.78, 19,660.11 and 11,911.43 is: 17,791.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,162.78 : 19,660.11 = 11,911.43 : x
  2. Step 2: Convert to fraction form
    13,162.78/19,660.11 = 11,911.43/x
  3. Step 3: Cross multiply
    13,162.78x = 19,660.11 × 11,911.43
  4. Step 4: Simplify right side
    13,162.78x = 234,180,028.54
  5. Step 5: Solve for x
    x = 234,180,028.54/13,162.78
  6. Step 6: Final answer
    x = 17,791.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.