Home / 15,409.44-21,286.80-12,261.60

Finding the Fourth Proportional to 15,409.44, 21,286.80 and 12,261.60

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Solution

The fourth proportional to 15,409.44, 21,286.80 and 12,261.60 is: 16,938.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,409.44 : 21,286.80 = 12,261.60 : x
  2. Step 2: Convert to fraction form
    15,409.44/21,286.80 = 12,261.60/x
  3. Step 3: Cross multiply
    15,409.44x = 21,286.80 × 12,261.60
  4. Step 4: Simplify right side
    15,409.44x = 261,010,226.88
  5. Step 5: Solve for x
    x = 261,010,226.88/15,409.44
  6. Step 6: Final answer
    x = 16,938.33

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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.