Home / 20,791.19-28,691.87-11,838.67

Finding the Fourth Proportional to 20,791.19, 28,691.87 and 11,838.67

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Solution

The fourth proportional to 20,791.19, 28,691.87 and 11,838.67 is: 16,337.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.19 : 28,691.87 = 11,838.67 : x
  2. Step 2: Convert to fraction form
    20,791.19/28,691.87 = 11,838.67/x
  3. Step 3: Cross multiply
    20,791.19x = 28,691.87 × 11,838.67
  4. Step 4: Simplify right side
    20,791.19x = 339,673,449.69
  5. Step 5: Solve for x
    x = 339,673,449.69/20,791.19
  6. Step 6: Final answer
    x = 16,337.37

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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.