Home / 20,942.66-31,336.21-11,715.14

Finding the Fourth Proportional to 20,942.66, 31,336.21 and 11,715.14

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Solution

The fourth proportional to 20,942.66, 31,336.21 and 11,715.14 is: 17,529.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.66 : 31,336.21 = 11,715.14 : x
  2. Step 2: Convert to fraction form
    20,942.66/31,336.21 = 11,715.14/x
  3. Step 3: Cross multiply
    20,942.66x = 31,336.21 × 11,715.14
  4. Step 4: Simplify right side
    20,942.66x = 367,108,087.22
  5. Step 5: Solve for x
    x = 367,108,087.22/20,942.66
  6. Step 6: Final answer
    x = 17,529.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.