Home / 20,975.54-31,474.20-19,765.40

Finding the Fourth Proportional to 20,975.54, 31,474.20 and 19,765.40

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Solution

The fourth proportional to 20,975.54, 31,474.20 and 19,765.40 is: 29,658.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.54 : 31,474.20 = 19,765.40 : x
  2. Step 2: Convert to fraction form
    20,975.54/31,474.20 = 19,765.40/x
  3. Step 3: Cross multiply
    20,975.54x = 31,474.20 × 19,765.40
  4. Step 4: Simplify right side
    20,975.54x = 622,100,152.68
  5. Step 5: Solve for x
    x = 622,100,152.68/20,975.54
  6. Step 6: Final answer
    x = 29,658.36

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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.