Home / 20,121.67-27,764.70-11,168.98

Finding the Fourth Proportional to 20,121.67, 27,764.70 and 11,168.98

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Solution

The fourth proportional to 20,121.67, 27,764.70 and 11,168.98 is: 15,411.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.67 : 27,764.70 = 11,168.98 : x
  2. Step 2: Convert to fraction form
    20,121.67/27,764.70 = 11,168.98/x
  3. Step 3: Cross multiply
    20,121.67x = 27,764.70 × 11,168.98
  4. Step 4: Simplify right side
    20,121.67x = 310,103,379.01
  5. Step 5: Solve for x
    x = 310,103,379.01/20,121.67
  6. Step 6: Final answer
    x = 15,411.41

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1.5x scale

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.