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Finding the Fourth Proportional to 18,403.60, 25,383.60 and 11,327.44

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Solution

The fourth proportional to 18,403.60, 25,383.60 and 11,327.44 is: 15,623.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.60 : 25,383.60 = 11,327.44 : x
  2. Step 2: Convert to fraction form
    18,403.60/25,383.60 = 11,327.44/x
  3. Step 3: Cross multiply
    18,403.60x = 25,383.60 × 11,327.44
  4. Step 4: Simplify right side
    18,403.60x = 287,531,205.98
  5. Step 5: Solve for x
    x = 287,531,205.98/18,403.60
  6. Step 6: Final answer
    x = 15,623.64

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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.