Home / 20,940.82-28,898.62-11,509.31

Finding the Fourth Proportional to 20,940.82, 28,898.62 and 11,509.31

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Solution

The fourth proportional to 20,940.82, 28,898.62 and 11,509.31 is: 15,883.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.82 : 28,898.62 = 11,509.31 : x
  2. Step 2: Convert to fraction form
    20,940.82/28,898.62 = 11,509.31/x
  3. Step 3: Cross multiply
    20,940.82x = 28,898.62 × 11,509.31
  4. Step 4: Simplify right side
    20,940.82x = 332,603,219.63
  5. Step 5: Solve for x
    x = 332,603,219.63/20,940.82
  6. Step 6: Final answer
    x = 15,883.01

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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.