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Finding the Fourth Proportional to 13,343.80, 18,409.80 and 8,305.08

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Solution

The fourth proportional to 13,343.80, 18,409.80 and 8,305.08 is: 11,458.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,343.80 : 18,409.80 = 8,305.08 : x
  2. Step 2: Convert to fraction form
    13,343.80/18,409.80 = 8,305.08/x
  3. Step 3: Cross multiply
    13,343.80x = 18,409.80 × 8,305.08
  4. Step 4: Simplify right side
    13,343.80x = 152,894,861.78
  5. Step 5: Solve for x
    x = 152,894,861.78/13,343.80
  6. Step 6: Final answer
    x = 11,458.12

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.