Home / 20,884.69-28,820.83-11,453.86

Finding the Fourth Proportional to 20,884.69, 28,820.83 and 11,453.86

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Solution

The fourth proportional to 20,884.69, 28,820.83 and 11,453.86 is: 15,806.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.69 : 28,820.83 = 11,453.86 : x
  2. Step 2: Convert to fraction form
    20,884.69/28,820.83 = 11,453.86/x
  3. Step 3: Cross multiply
    20,884.69x = 28,820.83 × 11,453.86
  4. Step 4: Simplify right side
    20,884.69x = 330,109,751.90
  5. Step 5: Solve for x
    x = 330,109,751.90/20,884.69
  6. Step 6: Final answer
    x = 15,806.30

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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.