Home / 20,338.88-28,067.36-11,386.37

Finding the Fourth Proportional to 20,338.88, 28,067.36 and 11,386.37

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Solution

The fourth proportional to 20,338.88, 28,067.36 and 11,386.37 is: 15,713.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,338.88 : 28,067.36 = 11,386.37 : x
  2. Step 2: Convert to fraction form
    20,338.88/28,067.36 = 11,386.37/x
  3. Step 3: Cross multiply
    20,338.88x = 28,067.36 × 11,386.37
  4. Step 4: Simplify right side
    20,338.88x = 319,585,359.12
  5. Step 5: Solve for x
    x = 319,585,359.12/20,338.88
  6. Step 6: Final answer
    x = 15,713.03

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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.