Home / 20,668.68-28,535.94-13,607.28

Finding the Fourth Proportional to 20,668.68, 28,535.94 and 13,607.28

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Solution

The fourth proportional to 20,668.68, 28,535.94 and 13,607.28 is: 18,786.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.68 : 28,535.94 = 13,607.28 : x
  2. Step 2: Convert to fraction form
    20,668.68/28,535.94 = 13,607.28/x
  3. Step 3: Cross multiply
    20,668.68x = 28,535.94 × 13,607.28
  4. Step 4: Simplify right side
    20,668.68x = 388,296,525.64
  5. Step 5: Solve for x
    x = 388,296,525.64/20,668.68
  6. Step 6: Final answer
    x = 18,786.71

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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.