Home / 20,467.98-28,245.56-11,515.55

Finding the Fourth Proportional to 20,467.98, 28,245.56 and 11,515.55

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Solution

The fourth proportional to 20,467.98, 28,245.56 and 11,515.55 is: 15,891.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,467.98 : 28,245.56 = 11,515.55 : x
  2. Step 2: Convert to fraction form
    20,467.98/28,245.56 = 11,515.55/x
  3. Step 3: Cross multiply
    20,467.98x = 28,245.56 × 11,515.55
  4. Step 4: Simplify right side
    20,467.98x = 325,262,959.65
  5. Step 5: Solve for x
    x = 325,262,959.65/20,467.98
  6. Step 6: Final answer
    x = 15,891.31

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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.