Home / 20,855.44-31,261.20-12,958

Finding the Fourth Proportional to 20,855.44, 31,261.20 and 12,958

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Solution

The fourth proportional to 20,855.44, 31,261.20 and 12,958 is: 19,423.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.44 : 31,261.20 = 12,958 : x
  2. Step 2: Convert to fraction form
    20,855.44/31,261.20 = 12,958/x
  3. Step 3: Cross multiply
    20,855.44x = 31,261.20 × 12,958
  4. Step 4: Simplify right side
    20,855.44x = 405,082,629.60
  5. Step 5: Solve for x
    x = 405,082,629.60/20,855.44
  6. Step 6: Final answer
    x = 19,423.36

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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.