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Finding the Fourth Proportional to 20,028.48, 30,030 and 10,662.72

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Solution

The fourth proportional to 20,028.48, 30,030 and 10,662.72 is: 15,987.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,028.48 : 30,030 = 10,662.72 : x
  2. Step 2: Convert to fraction form
    20,028.48/30,030 = 10,662.72/x
  3. Step 3: Cross multiply
    20,028.48x = 30,030 × 10,662.72
  4. Step 4: Simplify right side
    20,028.48x = 320,201,481.60
  5. Step 5: Solve for x
    x = 320,201,481.60/20,028.48
  6. Step 6: Final answer
    x = 15,987.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.