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Finding the Fourth Proportional to 13,179.30, 18,186.89 and 7,877.04

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Solution

The fourth proportional to 13,179.30, 18,186.89 and 7,877.04 is: 10,869.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.30 : 18,186.89 = 7,877.04 : x
  2. Step 2: Convert to fraction form
    13,179.30/18,186.89 = 7,877.04/x
  3. Step 3: Cross multiply
    13,179.30x = 18,186.89 × 7,877.04
  4. Step 4: Simplify right side
    13,179.30x = 143,258,860.01
  5. Step 5: Solve for x
    x = 143,258,860.01/13,179.30
  6. Step 6: Final answer
    x = 10,869.99

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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.