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Finding the Fourth Proportional to 20,185.60, 30,249.60 and 14,879.20

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Solution

The fourth proportional to 20,185.60, 30,249.60 and 14,879.20 is: 22,297.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,185.60 : 30,249.60 = 14,879.20 : x
  2. Step 2: Convert to fraction form
    20,185.60/30,249.60 = 14,879.20/x
  3. Step 3: Cross multiply
    20,185.60x = 30,249.60 × 14,879.20
  4. Step 4: Simplify right side
    20,185.60x = 450,089,848.32
  5. Step 5: Solve for x
    x = 450,089,848.32/20,185.60
  6. Step 6: Final answer
    x = 22,297.57

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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.