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Finding the Fourth Proportional to 18,736.80, 28,101.60 and 5,589.60

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Solution

The fourth proportional to 18,736.80, 28,101.60 and 5,589.60 is: 8,383.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,736.80 : 28,101.60 = 5,589.60 : x
  2. Step 2: Convert to fraction form
    18,736.80/28,101.60 = 5,589.60/x
  3. Step 3: Cross multiply
    18,736.80x = 28,101.60 × 5,589.60
  4. Step 4: Simplify right side
    18,736.80x = 157,076,703.36
  5. Step 5: Solve for x
    x = 157,076,703.36/18,736.80
  6. Step 6: Final answer
    x = 8,383.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.