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Finding the Fourth Proportional to 12,136.53, 18,211.87 and 5,116.11

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Solution

The fourth proportional to 12,136.53, 18,211.87 and 5,116.11 is: 7,677.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,136.53 : 18,211.87 = 5,116.11 : x
  2. Step 2: Convert to fraction form
    12,136.53/18,211.87 = 5,116.11/x
  3. Step 3: Cross multiply
    12,136.53x = 18,211.87 × 5,116.11
  4. Step 4: Simplify right side
    12,136.53x = 93,173,907.84
  5. Step 5: Solve for x
    x = 93,173,907.84/12,136.53
  6. Step 6: Final answer
    x = 7,677.15

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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.