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Finding the Fourth Proportional to 9,279.70, 13,921.49 and 3,039.22

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Solution

The fourth proportional to 9,279.70, 13,921.49 and 3,039.22 is: 4,559.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,279.70 : 13,921.49 = 3,039.22 : x
  2. Step 2: Convert to fraction form
    9,279.70/13,921.49 = 3,039.22/x
  3. Step 3: Cross multiply
    9,279.70x = 13,921.49 × 3,039.22
  4. Step 4: Simplify right side
    9,279.70x = 42,310,470.84
  5. Step 5: Solve for x
    x = 42,310,470.84/9,279.70
  6. Step 6: Final answer
    x = 4,559.47

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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.