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Finding the Fourth Proportional to 20,340.75, 28,068.73 and 11,842.94

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Solution

The fourth proportional to 20,340.75, 28,068.73 and 11,842.94 is: 16,342.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.75 : 28,068.73 = 11,842.94 : x
  2. Step 2: Convert to fraction form
    20,340.75/28,068.73 = 11,842.94/x
  3. Step 3: Cross multiply
    20,340.75x = 28,068.73 × 11,842.94
  4. Step 4: Simplify right side
    20,340.75x = 332,416,325.83
  5. Step 5: Solve for x
    x = 332,416,325.83/20,340.75
  6. Step 6: Final answer
    x = 16,342.38

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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.