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Finding the Fourth Proportional to 28,668.39, 43,009.87 and 8,947.11

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Solution

The fourth proportional to 28,668.39, 43,009.87 and 8,947.11 is: 13,422.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,668.39 : 43,009.87 = 8,947.11 : x
  2. Step 2: Convert to fraction form
    28,668.39/43,009.87 = 8,947.11/x
  3. Step 3: Cross multiply
    28,668.39x = 43,009.87 × 8,947.11
  4. Step 4: Simplify right side
    28,668.39x = 384,814,037.98
  5. Step 5: Solve for x
    x = 384,814,037.98/28,668.39
  6. Step 6: Final answer
    x = 13,422.94

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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.