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Finding the Fourth Proportional to 13,154.65, 18,153.81 and 7,186.60

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Solution

The fourth proportional to 13,154.65, 18,153.81 and 7,186.60 is: 9,917.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,154.65 : 18,153.81 = 7,186.60 : x
  2. Step 2: Convert to fraction form
    13,154.65/18,153.81 = 7,186.60/x
  3. Step 3: Cross multiply
    13,154.65x = 18,153.81 × 7,186.60
  4. Step 4: Simplify right side
    13,154.65x = 130,464,170.95
  5. Step 5: Solve for x
    x = 130,464,170.95/13,154.65
  6. Step 6: Final answer
    x = 9,917.72

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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.