Home / 20,416.64-28,175.81-11,917.44

Finding the Fourth Proportional to 20,416.64, 28,175.81 and 11,917.44

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Solution

The fourth proportional to 20,416.64, 28,175.81 and 11,917.44 is: 16,446.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,416.64 : 28,175.81 = 11,917.44 : x
  2. Step 2: Convert to fraction form
    20,416.64/28,175.81 = 11,917.44/x
  3. Step 3: Cross multiply
    20,416.64x = 28,175.81 × 11,917.44
  4. Step 4: Simplify right side
    20,416.64x = 335,783,465.54
  5. Step 5: Solve for x
    x = 335,783,465.54/20,416.64
  6. Step 6: Final answer
    x = 16,446.56

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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.