Home / 11,821.86-17,739.70-6,561.30

Finding the Fourth Proportional to 11,821.86, 17,739.70 and 6,561.30

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Solution

The fourth proportional to 11,821.86, 17,739.70 and 6,561.30 is: 9,845.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,821.86 : 17,739.70 = 6,561.30 : x
  2. Step 2: Convert to fraction form
    11,821.86/17,739.70 = 6,561.30/x
  3. Step 3: Cross multiply
    11,821.86x = 17,739.70 × 6,561.30
  4. Step 4: Simplify right side
    11,821.86x = 116,395,493.61
  5. Step 5: Solve for x
    x = 116,395,493.61/11,821.86
  6. Step 6: Final answer
    x = 9,845.79

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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.