Home / 13,770.42-19,003.12-8,105.12

Finding the Fourth Proportional to 13,770.42, 19,003.12 and 8,105.12

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Solution

The fourth proportional to 13,770.42, 19,003.12 and 8,105.12 is: 11,185.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,770.42 : 19,003.12 = 8,105.12 : x
  2. Step 2: Convert to fraction form
    13,770.42/19,003.12 = 8,105.12/x
  3. Step 3: Cross multiply
    13,770.42x = 19,003.12 × 8,105.12
  4. Step 4: Simplify right side
    13,770.42x = 154,022,567.97
  5. Step 5: Solve for x
    x = 154,022,567.97/13,770.42
  6. Step 6: Final answer
    x = 11,185.03

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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.