Home / 21,169.30-31,760.56-12,745.04

Finding the Fourth Proportional to 21,169.30, 31,760.56 and 12,745.04

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Solution

The fourth proportional to 21,169.30, 31,760.56 and 12,745.04 is: 19,121.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.30 : 31,760.56 = 12,745.04 : x
  2. Step 2: Convert to fraction form
    21,169.30/31,760.56 = 12,745.04/x
  3. Step 3: Cross multiply
    21,169.30x = 31,760.56 × 12,745.04
  4. Step 4: Simplify right side
    21,169.30x = 404,789,607.62
  5. Step 5: Solve for x
    x = 404,789,607.62/21,169.30
  6. Step 6: Final answer
    x = 19,121.54

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1.5x scale

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.