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Finding the Fourth Proportional to 12,279.32, 18,437.46 and 7,370.94

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Solution

The fourth proportional to 12,279.32, 18,437.46 and 7,370.94 is: 11,067.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.32 : 18,437.46 = 7,370.94 : x
  2. Step 2: Convert to fraction form
    12,279.32/18,437.46 = 7,370.94/x
  3. Step 3: Cross multiply
    12,279.32x = 18,437.46 × 7,370.94
  4. Step 4: Simplify right side
    12,279.32x = 135,901,411.41
  5. Step 5: Solve for x
    x = 135,901,411.41/12,279.32
  6. Step 6: Final answer
    x = 11,067.50

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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.