Home / 5,409.09-8,109.86-2,485.80

Finding the Fourth Proportional to 5,409.09, 8,109.86 and 2,485.80

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Solution

The fourth proportional to 5,409.09, 8,109.86 and 2,485.80 is: 3,726.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409.09 : 8,109.86 = 2,485.80 : x
  2. Step 2: Convert to fraction form
    5,409.09/8,109.86 = 2,485.80/x
  3. Step 3: Cross multiply
    5,409.09x = 8,109.86 × 2,485.80
  4. Step 4: Simplify right side
    5,409.09x = 20,159,477.56
  5. Step 5: Solve for x
    x = 20,159,477.56/5,409.09
  6. Step 6: Final answer
    x = 3,726.96

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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.