Home / 13,789.26-20,661.21-7,950.78

Finding the Fourth Proportional to 13,789.26, 20,661.21 and 7,950.78

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Solution

The fourth proportional to 13,789.26, 20,661.21 and 7,950.78 is: 11,913.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.26 : 20,661.21 = 7,950.78 : x
  2. Step 2: Convert to fraction form
    13,789.26/20,661.21 = 7,950.78/x
  3. Step 3: Cross multiply
    13,789.26x = 20,661.21 × 7,950.78
  4. Step 4: Simplify right side
    13,789.26x = 164,272,735.24
  5. Step 5: Solve for x
    x = 164,272,735.24/13,789.26
  6. Step 6: Final answer
    x = 11,913.09

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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.