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Finding the Fourth Proportional to 20,664, 31,108.46 and 18,826.92

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Solution

The fourth proportional to 20,664, 31,108.46 and 18,826.92 is: 28,342.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664 : 31,108.46 = 18,826.92 : x
  2. Step 2: Convert to fraction form
    20,664/31,108.46 = 18,826.92/x
  3. Step 3: Cross multiply
    20,664x = 31,108.46 × 18,826.92
  4. Step 4: Simplify right side
    20,664x = 585,676,487.74
  5. Step 5: Solve for x
    x = 585,676,487.74/20,664
  6. Step 6: Final answer
    x = 28,342.84

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These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.