Home / 20,186.58-30,290.40-11,438.58

Finding the Fourth Proportional to 20,186.58, 30,290.40 and 11,438.58

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Solution

The fourth proportional to 20,186.58, 30,290.40 and 11,438.58 is: 17,163.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,186.58 : 30,290.40 = 11,438.58 : x
  2. Step 2: Convert to fraction form
    20,186.58/30,290.40 = 11,438.58/x
  3. Step 3: Cross multiply
    20,186.58x = 30,290.40 × 11,438.58
  4. Step 4: Simplify right side
    20,186.58x = 346,479,163.63
  5. Step 5: Solve for x
    x = 346,479,163.63/20,186.58
  6. Step 6: Final answer
    x = 17,163.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.