Home / 12,739.85-17,589.75-7,961.87

Finding the Fourth Proportional to 12,739.85, 17,589.75 and 7,961.87

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Solution

The fourth proportional to 12,739.85, 17,589.75 and 7,961.87 is: 10,992.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.85 : 17,589.75 = 7,961.87 : x
  2. Step 2: Convert to fraction form
    12,739.85/17,589.75 = 7,961.87/x
  3. Step 3: Cross multiply
    12,739.85x = 17,589.75 × 7,961.87
  4. Step 4: Simplify right side
    12,739.85x = 140,047,214.88
  5. Step 5: Solve for x
    x = 140,047,214.88/12,739.85
  6. Step 6: Final answer
    x = 10,992.85

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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.