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Finding the Fourth Proportional to 8,912, 13,368.72 and 2,756

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Solution

The fourth proportional to 8,912, 13,368.72 and 2,756 is: 4,134.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912 : 13,368.72 = 2,756 : x
  2. Step 2: Convert to fraction form
    8,912/13,368.72 = 2,756/x
  3. Step 3: Cross multiply
    8,912x = 13,368.72 × 2,756
  4. Step 4: Simplify right side
    8,912x = 36,844,192.32
  5. Step 5: Solve for x
    x = 36,844,192.32/8,912
  6. Step 6: Final answer
    x = 4,134.22

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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.