Home / 20,418.87-30,629.45-7,271.24

Finding the Fourth Proportional to 20,418.87, 30,629.45 and 7,271.24

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Solution

The fourth proportional to 20,418.87, 30,629.45 and 7,271.24 is: 10,907.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.87 : 30,629.45 = 7,271.24 : x
  2. Step 2: Convert to fraction form
    20,418.87/30,629.45 = 7,271.24/x
  3. Step 3: Cross multiply
    20,418.87x = 30,629.45 × 7,271.24
  4. Step 4: Simplify right side
    20,418.87x = 222,714,012.74
  5. Step 5: Solve for x
    x = 222,714,012.74/20,418.87
  6. Step 6: Final answer
    x = 10,907.27

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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.