Home / 20,771.80-28,664.94-11,340.37

Finding the Fourth Proportional to 20,771.80, 28,664.94 and 11,340.37

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Solution

The fourth proportional to 20,771.80, 28,664.94 and 11,340.37 is: 15,649.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.80 : 28,664.94 = 11,340.37 : x
  2. Step 2: Convert to fraction form
    20,771.80/28,664.94 = 11,340.37/x
  3. Step 3: Cross multiply
    20,771.80x = 28,664.94 × 11,340.37
  4. Step 4: Simplify right side
    20,771.80x = 325,070,991.03
  5. Step 5: Solve for x
    x = 325,070,991.03/20,771.80
  6. Step 6: Final answer
    x = 15,649.63

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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.