Home / 20,468.68-28,245.58-11,515.80

Finding the Fourth Proportional to 20,468.68, 28,245.58 and 11,515.80

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Solution

The fourth proportional to 20,468.68, 28,245.58 and 11,515.80 is: 15,891.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,468.68 : 28,245.58 = 11,515.80 : x
  2. Step 2: Convert to fraction form
    20,468.68/28,245.58 = 11,515.80/x
  3. Step 3: Cross multiply
    20,468.68x = 28,245.58 × 11,515.80
  4. Step 4: Simplify right side
    20,468.68x = 325,270,450.16
  5. Step 5: Solve for x
    x = 325,270,450.16/20,468.68
  6. Step 6: Final answer
    x = 15,891.13

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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.