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Finding the Fourth Proportional to 8,661.96, 13,047.46 and 7,886.88

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Solution

The fourth proportional to 8,661.96, 13,047.46 and 7,886.88 is: 11,879.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.96 : 13,047.46 = 7,886.88 : x
  2. Step 2: Convert to fraction form
    8,661.96/13,047.46 = 7,886.88/x
  3. Step 3: Cross multiply
    8,661.96x = 13,047.46 × 7,886.88
  4. Step 4: Simplify right side
    8,661.96x = 102,903,731.61
  5. Step 5: Solve for x
    x = 102,903,731.61/8,661.96
  6. Step 6: Final answer
    x = 11,879.96

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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.