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Finding the Fourth Proportional to 20,968, 28,936.29 and 11,536.58

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Solution

The fourth proportional to 20,968, 28,936.29 and 11,536.58 is: 15,920.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968 : 28,936.29 = 11,536.58 : x
  2. Step 2: Convert to fraction form
    20,968/28,936.29 = 11,536.58/x
  3. Step 3: Cross multiply
    20,968x = 28,936.29 × 11,536.58
  4. Step 4: Simplify right side
    20,968x = 333,825,824.49
  5. Step 5: Solve for x
    x = 333,825,824.49/20,968
  6. Step 6: Final answer
    x = 15,920.73

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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.