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Finding the Fourth Proportional to 28,676.40, 43,015.92 and 7,900.08

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Solution

The fourth proportional to 28,676.40, 43,015.92 and 7,900.08 is: 11,850.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,676.40 : 43,015.92 = 7,900.08 : x
  2. Step 2: Convert to fraction form
    28,676.40/43,015.92 = 7,900.08/x
  3. Step 3: Cross multiply
    28,676.40x = 43,015.92 × 7,900.08
  4. Step 4: Simplify right side
    28,676.40x = 339,829,209.27
  5. Step 5: Solve for x
    x = 339,829,209.27/28,676.40
  6. Step 6: Final answer
    x = 11,850.48

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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.