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Finding the Fourth Proportional to 20,904, 31,356 and 8,592

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Solution

The fourth proportional to 20,904, 31,356 and 8,592 is: 12,888

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904 : 31,356 = 8,592 : x
  2. Step 2: Convert to fraction form
    20,904/31,356 = 8,592/x
  3. Step 3: Cross multiply
    20,904x = 31,356 × 8,592
  4. Step 4: Simplify right side
    20,904x = 269,410,752
  5. Step 5: Solve for x
    x = 269,410,752/20,904
  6. Step 6: Final answer
    x = 12,888

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.