Home / 20,399.58-28,147.68-13,694.94

Finding the Fourth Proportional to 20,399.58, 28,147.68 and 13,694.94

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Solution

The fourth proportional to 20,399.58, 28,147.68 and 13,694.94 is: 18,896.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.58 : 28,147.68 = 13,694.94 : x
  2. Step 2: Convert to fraction form
    20,399.58/28,147.68 = 13,694.94/x
  3. Step 3: Cross multiply
    20,399.58x = 28,147.68 × 13,694.94
  4. Step 4: Simplify right side
    20,399.58x = 385,480,788.74
  5. Step 5: Solve for x
    x = 385,480,788.74/20,399.58
  6. Step 6: Final answer
    x = 18,896.51

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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.