Home / 20,429.07-28,201.77-13,634.34

Finding the Fourth Proportional to 20,429.07, 28,201.77 and 13,634.34

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Solution

The fourth proportional to 20,429.07, 28,201.77 and 13,634.34 is: 18,821.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.07 : 28,201.77 = 13,634.34 : x
  2. Step 2: Convert to fraction form
    20,429.07/28,201.77 = 13,634.34/x
  3. Step 3: Cross multiply
    20,429.07x = 28,201.77 × 13,634.34
  4. Step 4: Simplify right side
    20,429.07x = 384,512,520.78
  5. Step 5: Solve for x
    x = 384,512,520.78/20,429.07
  6. Step 6: Final answer
    x = 18,821.83

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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.