Home / 20,832.64-28,745.62-11,880.32

Finding the Fourth Proportional to 20,832.64, 28,745.62 and 11,880.32

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Solution

The fourth proportional to 20,832.64, 28,745.62 and 11,880.32 is: 16,392.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,832.64 : 28,745.62 = 11,880.32 : x
  2. Step 2: Convert to fraction form
    20,832.64/28,745.62 = 11,880.32/x
  3. Step 3: Cross multiply
    20,832.64x = 28,745.62 × 11,880.32
  4. Step 4: Simplify right side
    20,832.64x = 341,507,164.20
  5. Step 5: Solve for x
    x = 341,507,164.20/20,832.64
  6. Step 6: Final answer
    x = 16,392.89

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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.