Home / 20,467.86-28,245.32-11,515.36

Finding the Fourth Proportional to 20,467.86, 28,245.32 and 11,515.36

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Solution

The fourth proportional to 20,467.86, 28,245.32 and 11,515.36 is: 15,891.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,467.86 : 28,245.32 = 11,515.36 : x
  2. Step 2: Convert to fraction form
    20,467.86/28,245.32 = 11,515.36/x
  3. Step 3: Cross multiply
    20,467.86x = 28,245.32 × 11,515.36
  4. Step 4: Simplify right side
    20,467.86x = 325,255,028.12
  5. Step 5: Solve for x
    x = 325,255,028.12/20,467.86
  6. Step 6: Final answer
    x = 15,891.01

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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.