Home / 20,945.76-28,905.18-11,514.38

Finding the Fourth Proportional to 20,945.76, 28,905.18 and 11,514.38

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Solution

The fourth proportional to 20,945.76, 28,905.18 and 11,514.38 is: 15,889.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.76 : 28,905.18 = 11,514.38 : x
  2. Step 2: Convert to fraction form
    20,945.76/28,905.18 = 11,514.38/x
  3. Step 3: Cross multiply
    20,945.76x = 28,905.18 × 11,514.38
  4. Step 4: Simplify right side
    20,945.76x = 332,825,226.49
  5. Step 5: Solve for x
    x = 332,825,226.49/20,945.76
  6. Step 6: Final answer
    x = 15,889.86

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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.