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Finding the Fourth Proportional to 9,318.96, 13,984.32 and 8,443.20

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Solution

The fourth proportional to 9,318.96, 13,984.32 and 8,443.20 is: 12,670.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.96 : 13,984.32 = 8,443.20 : x
  2. Step 2: Convert to fraction form
    9,318.96/13,984.32 = 8,443.20/x
  3. Step 3: Cross multiply
    9,318.96x = 13,984.32 × 8,443.20
  4. Step 4: Simplify right side
    9,318.96x = 118,072,410.62
  5. Step 5: Solve for x
    x = 118,072,410.62/9,318.96
  6. Step 6: Final answer
    x = 12,670.13

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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.