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Finding the Fourth Proportional to 9,318.72, 13,978.71 and 3,475.32

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Solution

The fourth proportional to 9,318.72, 13,978.71 and 3,475.32 is: 5,213.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.72 : 13,978.71 = 3,475.32 : x
  2. Step 2: Convert to fraction form
    9,318.72/13,978.71 = 3,475.32/x
  3. Step 3: Cross multiply
    9,318.72x = 13,978.71 × 3,475.32
  4. Step 4: Simplify right side
    9,318.72x = 48,580,490.44
  5. Step 5: Solve for x
    x = 48,580,490.44/9,318.72
  6. Step 6: Final answer
    x = 5,213.21

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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.