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Finding the Fourth Proportional to 18,693.12, 28,042.46 and 6,684.36

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Solution

The fourth proportional to 18,693.12, 28,042.46 and 6,684.36 is: 10,027.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.12 : 28,042.46 = 6,684.36 : x
  2. Step 2: Convert to fraction form
    18,693.12/28,042.46 = 6,684.36/x
  3. Step 3: Cross multiply
    18,693.12x = 28,042.46 × 6,684.36
  4. Step 4: Simplify right side
    18,693.12x = 187,445,897.93
  5. Step 5: Solve for x
    x = 187,445,897.93/18,693.12
  6. Step 6: Final answer
    x = 10,027.53

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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.