Home / 27,885.78-38,481.66-15,138.54

Finding the Fourth Proportional to 27,885.78, 38,481.66 and 15,138.54

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Solution

The fourth proportional to 27,885.78, 38,481.66 and 15,138.54 is: 20,890.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,885.78 : 38,481.66 = 15,138.54 : x
  2. Step 2: Convert to fraction form
    27,885.78/38,481.66 = 15,138.54/x
  3. Step 3: Cross multiply
    27,885.78x = 38,481.66 × 15,138.54
  4. Step 4: Simplify right side
    27,885.78x = 582,556,149.18
  5. Step 5: Solve for x
    x = 582,556,149.18/27,885.78
  6. Step 6: Final answer
    x = 20,890.80

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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.