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Finding the Fourth Proportional to 20,317.88, 28,041 and 11,367.65

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Solution

The fourth proportional to 20,317.88, 28,041 and 11,367.65 is: 15,688.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,317.88 : 28,041 = 11,367.65 : x
  2. Step 2: Convert to fraction form
    20,317.88/28,041 = 11,367.65/x
  3. Step 3: Cross multiply
    20,317.88x = 28,041 × 11,367.65
  4. Step 4: Simplify right side
    20,317.88x = 318,760,273.65
  5. Step 5: Solve for x
    x = 318,760,273.65/20,317.88
  6. Step 6: Final answer
    x = 15,688.66

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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.