Home / 20,825.52-28,738.64-11,393.48

Finding the Fourth Proportional to 20,825.52, 28,738.64 and 11,393.48

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Solution

The fourth proportional to 20,825.52, 28,738.64 and 11,393.48 is: 15,722.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.52 : 28,738.64 = 11,393.48 : x
  2. Step 2: Convert to fraction form
    20,825.52/28,738.64 = 11,393.48/x
  3. Step 3: Cross multiply
    20,825.52x = 28,738.64 × 11,393.48
  4. Step 4: Simplify right side
    20,825.52x = 327,433,120.07
  5. Step 5: Solve for x
    x = 327,433,120.07/20,825.52
  6. Step 6: Final answer
    x = 15,722.69

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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.