Home / 18,739.44-28,121.88-13,821.12

Finding the Fourth Proportional to 18,739.44, 28,121.88 and 13,821.12

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Solution

The fourth proportional to 18,739.44, 28,121.88 and 13,821.12 is: 20,741.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.44 : 28,121.88 = 13,821.12 : x
  2. Step 2: Convert to fraction form
    18,739.44/28,121.88 = 13,821.12/x
  3. Step 3: Cross multiply
    18,739.44x = 28,121.88 × 13,821.12
  4. Step 4: Simplify right side
    18,739.44x = 388,675,878.11
  5. Step 5: Solve for x
    x = 388,675,878.11/18,739.44
  6. Step 6: Final answer
    x = 20,741.06

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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.