Home / 20,871.04-28,804.38-11,919.80

Finding the Fourth Proportional to 20,871.04, 28,804.38 and 11,919.80

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Solution

The fourth proportional to 20,871.04, 28,804.38 and 11,919.80 is: 16,450.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.04 : 28,804.38 = 11,919.80 : x
  2. Step 2: Convert to fraction form
    20,871.04/28,804.38 = 11,919.80/x
  3. Step 3: Cross multiply
    20,871.04x = 28,804.38 × 11,919.80
  4. Step 4: Simplify right side
    20,871.04x = 343,342,448.72
  5. Step 5: Solve for x
    x = 343,342,448.72/20,871.04
  6. Step 6: Final answer
    x = 16,450.66

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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.