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Finding the Fourth Proportional to 13,051.72, 18,012.90 and 7,388.80

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Solution

The fourth proportional to 13,051.72, 18,012.90 and 7,388.80 is: 10,197.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,051.72 : 18,012.90 = 7,388.80 : x
  2. Step 2: Convert to fraction form
    13,051.72/18,012.90 = 7,388.80/x
  3. Step 3: Cross multiply
    13,051.72x = 18,012.90 × 7,388.80
  4. Step 4: Simplify right side
    13,051.72x = 133,093,715.52
  5. Step 5: Solve for x
    x = 133,093,715.52/13,051.72
  6. Step 6: Final answer
    x = 10,197.41

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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.