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Finding the Fourth Proportional to 9,168, 13,740.60 and 3,318.18

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Solution

The fourth proportional to 9,168, 13,740.60 and 3,318.18 is: 4,973.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,168 : 13,740.60 = 3,318.18 : x
  2. Step 2: Convert to fraction form
    9,168/13,740.60 = 3,318.18/x
  3. Step 3: Cross multiply
    9,168x = 13,740.60 × 3,318.18
  4. Step 4: Simplify right side
    9,168x = 45,593,784.11
  5. Step 5: Solve for x
    x = 45,593,784.11/9,168
  6. Step 6: Final answer
    x = 4,973.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.