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Finding the Fourth Proportional to 9,318.88, 13,979.74 and 3,079.55

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Solution

The fourth proportional to 9,318.88, 13,979.74 and 3,079.55 is: 4,619.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,318.88 : 13,979.74 = 3,079.55 : x
  2. Step 2: Convert to fraction form
    9,318.88/13,979.74 = 3,079.55/x
  3. Step 3: Cross multiply
    9,318.88x = 13,979.74 × 3,079.55
  4. Step 4: Simplify right side
    9,318.88x = 43,051,308.32
  5. Step 5: Solve for x
    x = 43,051,308.32/9,318.88
  6. Step 6: Final answer
    x = 4,619.79

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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.