Home / 20,579.40-28,399.38-11,629.80

Finding the Fourth Proportional to 20,579.40, 28,399.38 and 11,629.80

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Solution

The fourth proportional to 20,579.40, 28,399.38 and 11,629.80 is: 16,049.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.40 : 28,399.38 = 11,629.80 : x
  2. Step 2: Convert to fraction form
    20,579.40/28,399.38 = 11,629.80/x
  3. Step 3: Cross multiply
    20,579.40x = 28,399.38 × 11,629.80
  4. Step 4: Simplify right side
    20,579.40x = 330,279,109.52
  5. Step 5: Solve for x
    x = 330,279,109.52/20,579.40
  6. Step 6: Final answer
    x = 16,049.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.