Home / 11,739.20-17,589.60-9,780.80

Finding the Fourth Proportional to 11,739.20, 17,589.60 and 9,780.80

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Solution

The fourth proportional to 11,739.20, 17,589.60 and 9,780.80 is: 14,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,739.20 : 17,589.60 = 9,780.80 : x
  2. Step 2: Convert to fraction form
    11,739.20/17,589.60 = 9,780.80/x
  3. Step 3: Cross multiply
    11,739.20x = 17,589.60 × 9,780.80
  4. Step 4: Simplify right side
    11,739.20x = 172,040,359.68
  5. Step 5: Solve for x
    x = 172,040,359.68/11,739.20
  6. Step 6: Final answer
    x = 14,655.20

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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.