Home / 20,186.10-30,297.15-11,855.70

Finding the Fourth Proportional to 20,186.10, 30,297.15 and 11,855.70

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Solution

The fourth proportional to 20,186.10, 30,297.15 and 11,855.70 is: 17,794.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,186.10 : 30,297.15 = 11,855.70 : x
  2. Step 2: Convert to fraction form
    20,186.10/30,297.15 = 11,855.70/x
  3. Step 3: Cross multiply
    20,186.10x = 30,297.15 × 11,855.70
  4. Step 4: Simplify right side
    20,186.10x = 359,193,921.26
  5. Step 5: Solve for x
    x = 359,193,921.26/20,186.10
  6. Step 6: Final answer
    x = 17,794.12

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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.