Home / 20,910.52-28,857.26-11,479.80

Finding the Fourth Proportional to 20,910.52, 28,857.26 and 11,479.80

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Solution

The fourth proportional to 20,910.52, 28,857.26 and 11,479.80 is: 15,842.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.52 : 28,857.26 = 11,479.80 : x
  2. Step 2: Convert to fraction form
    20,910.52/28,857.26 = 11,479.80/x
  3. Step 3: Cross multiply
    20,910.52x = 28,857.26 × 11,479.80
  4. Step 4: Simplify right side
    20,910.52x = 331,275,573.35
  5. Step 5: Solve for x
    x = 331,275,573.35/20,910.52
  6. Step 6: Final answer
    x = 15,842.53

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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.