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Finding the Fourth Proportional to 20,926.64, 28,879 and 11,495

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Solution

The fourth proportional to 20,926.64, 28,879 and 11,495 is: 15,863.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.64 : 28,879 = 11,495 : x
  2. Step 2: Convert to fraction form
    20,926.64/28,879 = 11,495/x
  3. Step 3: Cross multiply
    20,926.64x = 28,879 × 11,495
  4. Step 4: Simplify right side
    20,926.64x = 331,964,105
  5. Step 5: Solve for x
    x = 331,964,105/20,926.64
  6. Step 6: Final answer
    x = 15,863.23

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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.