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Finding the Fourth Proportional to 20,907.44, 28,852.37 and 11,476

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Solution

The fourth proportional to 20,907.44, 28,852.37 and 11,476 is: 15,836.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.44 : 28,852.37 = 11,476 : x
  2. Step 2: Convert to fraction form
    20,907.44/28,852.37 = 11,476/x
  3. Step 3: Cross multiply
    20,907.44x = 28,852.37 × 11,476
  4. Step 4: Simplify right side
    20,907.44x = 331,109,798.12
  5. Step 5: Solve for x
    x = 331,109,798.12/20,907.44
  6. Step 6: Final answer
    x = 15,836.94

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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.