Home / 13,170.96-18,185.45-8,142.07

Finding the Fourth Proportional to 13,170.96, 18,185.45 and 8,142.07

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Solution

The fourth proportional to 13,170.96, 18,185.45 and 8,142.07 is: 11,241.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.96 : 18,185.45 = 8,142.07 : x
  2. Step 2: Convert to fraction form
    13,170.96/18,185.45 = 8,142.07/x
  3. Step 3: Cross multiply
    13,170.96x = 18,185.45 × 8,142.07
  4. Step 4: Simplify right side
    13,170.96x = 148,067,206.88
  5. Step 5: Solve for x
    x = 148,067,206.88/13,170.96
  6. Step 6: Final answer
    x = 11,241.94

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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.