Home / 20,821.80-28,733.83-11,869.01

Finding the Fourth Proportional to 20,821.80, 28,733.83 and 11,869.01

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Solution

The fourth proportional to 20,821.80, 28,733.83 and 11,869.01 is: 16,379.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.80 : 28,733.83 = 11,869.01 : x
  2. Step 2: Convert to fraction form
    20,821.80/28,733.83 = 11,869.01/x
  3. Step 3: Cross multiply
    20,821.80x = 28,733.83 × 11,869.01
  4. Step 4: Simplify right side
    20,821.80x = 341,041,942.27
  5. Step 5: Solve for x
    x = 341,041,942.27/20,821.80
  6. Step 6: Final answer
    x = 16,379.08

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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.