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Finding the Fourth Proportional to 47,592, 71,388 and 19,890

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Solution

The fourth proportional to 47,592, 71,388 and 19,890 is: 29,835

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,592 : 71,388 = 19,890 : x
  2. Step 2: Convert to fraction form
    47,592/71,388 = 19,890/x
  3. Step 3: Cross multiply
    47,592x = 71,388 × 19,890
  4. Step 4: Simplify right side
    47,592x = 1,419,907,320
  5. Step 5: Solve for x
    x = 1,419,907,320/47,592
  6. Step 6: Final answer
    x = 29,835

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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.