Home / 20,829.80-28,744.42-11,880.20

Finding the Fourth Proportional to 20,829.80, 28,744.42 and 11,880.20

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Solution

The fourth proportional to 20,829.80, 28,744.42 and 11,880.20 is: 16,394.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.80 : 28,744.42 = 11,880.20 : x
  2. Step 2: Convert to fraction form
    20,829.80/28,744.42 = 11,880.20/x
  3. Step 3: Cross multiply
    20,829.80x = 28,744.42 × 11,880.20
  4. Step 4: Simplify right side
    20,829.80x = 341,489,458.48
  5. Step 5: Solve for x
    x = 341,489,458.48/20,829.80
  6. Step 6: Final answer
    x = 16,394.27

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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.