Home / 13,682.42-18,879.38-7,937.80

Finding the Fourth Proportional to 13,682.42, 18,879.38 and 7,937.80

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Solution

The fourth proportional to 13,682.42, 18,879.38 and 7,937.80 is: 10,952.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,682.42 : 18,879.38 = 7,937.80 : x
  2. Step 2: Convert to fraction form
    13,682.42/18,879.38 = 7,937.80/x
  3. Step 3: Cross multiply
    13,682.42x = 18,879.38 × 7,937.80
  4. Step 4: Simplify right side
    13,682.42x = 149,860,608.48
  5. Step 5: Solve for x
    x = 149,860,608.48/13,682.42
  6. Step 6: Final answer
    x = 10,952.79

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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.