Home / 20,771.06-28,664.16-11,339.70

Finding the Fourth Proportional to 20,771.06, 28,664.16 and 11,339.70

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Solution

The fourth proportional to 20,771.06, 28,664.16 and 11,339.70 is: 15,648.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.06 : 28,664.16 = 11,339.70 : x
  2. Step 2: Convert to fraction form
    20,771.06/28,664.16 = 11,339.70/x
  3. Step 3: Cross multiply
    20,771.06x = 28,664.16 × 11,339.70
  4. Step 4: Simplify right side
    20,771.06x = 325,042,975.15
  5. Step 5: Solve for x
    x = 325,042,975.15/20,771.06
  6. Step 6: Final answer
    x = 15,648.84

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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.