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Finding the Fourth Proportional to 12,187.67, 18,265.10 and 8,885.30

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Solution

The fourth proportional to 12,187.67, 18,265.10 and 8,885.30 is: 13,315.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.67 : 18,265.10 = 8,885.30 : x
  2. Step 2: Convert to fraction form
    12,187.67/18,265.10 = 8,885.30/x
  3. Step 3: Cross multiply
    12,187.67x = 18,265.10 × 8,885.30
  4. Step 4: Simplify right side
    12,187.67x = 162,290,757.28
  5. Step 5: Solve for x
    x = 162,290,757.28/12,187.67
  6. Step 6: Final answer
    x = 13,315.98

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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.