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Finding the Fourth Proportional to 8,661.60, 12,969.72 and 6,715.44

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Solution

The fourth proportional to 8,661.60, 12,969.72 and 6,715.44 is: 10,055.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.60 : 12,969.72 = 6,715.44 : x
  2. Step 2: Convert to fraction form
    8,661.60/12,969.72 = 6,715.44/x
  3. Step 3: Cross multiply
    8,661.60x = 12,969.72 × 6,715.44
  4. Step 4: Simplify right side
    8,661.60x = 87,097,376.48
  5. Step 5: Solve for x
    x = 87,097,376.48/8,661.60
  6. Step 6: Final answer
    x = 10,055.58

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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.