Home / 20,945.87-28,905.33-11,514.43

Finding the Fourth Proportional to 20,945.87, 28,905.33 and 11,514.43

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Solution

The fourth proportional to 20,945.87, 28,905.33 and 11,514.43 is: 15,889.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.87 : 28,905.33 = 11,514.43 : x
  2. Step 2: Convert to fraction form
    20,945.87/28,905.33 = 11,514.43/x
  3. Step 3: Cross multiply
    20,945.87x = 28,905.33 × 11,514.43
  4. Step 4: Simplify right side
    20,945.87x = 332,828,398.91
  5. Step 5: Solve for x
    x = 332,828,398.91/20,945.87
  6. Step 6: Final answer
    x = 15,889.93

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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.