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Finding the Fourth Proportional to 13,716.72, 18,929.10 and 7,429.02

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Solution

The fourth proportional to 13,716.72, 18,929.10 and 7,429.02 is: 10,252.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.72 : 18,929.10 = 7,429.02 : x
  2. Step 2: Convert to fraction form
    13,716.72/18,929.10 = 7,429.02/x
  3. Step 3: Cross multiply
    13,716.72x = 18,929.10 × 7,429.02
  4. Step 4: Simplify right side
    13,716.72x = 140,624,662.48
  5. Step 5: Solve for x
    x = 140,624,662.48/13,716.72
  6. Step 6: Final answer
    x = 10,252.06

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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.