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Finding the Fourth Proportional to 13,158.89, 18,160.50 and 7,191.44

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Solution

The fourth proportional to 13,158.89, 18,160.50 and 7,191.44 is: 9,924.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.89 : 18,160.50 = 7,191.44 : x
  2. Step 2: Convert to fraction form
    13,158.89/18,160.50 = 7,191.44/x
  3. Step 3: Cross multiply
    13,158.89x = 18,160.50 × 7,191.44
  4. Step 4: Simplify right side
    13,158.89x = 130,600,146.12
  5. Step 5: Solve for x
    x = 130,600,146.12/13,158.89
  6. Step 6: Final answer
    x = 9,924.86

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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.