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Finding the Fourth Proportional to 28,918.86, 43,375.05 and 9,195.90

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Solution

The fourth proportional to 28,918.86, 43,375.05 and 9,195.90 is: 13,792.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.86 : 43,375.05 = 9,195.90 : x
  2. Step 2: Convert to fraction form
    28,918.86/43,375.05 = 9,195.90/x
  3. Step 3: Cross multiply
    28,918.86x = 43,375.05 × 9,195.90
  4. Step 4: Simplify right side
    28,918.86x = 398,872,622.30
  5. Step 5: Solve for x
    x = 398,872,622.30/28,918.86
  6. Step 6: Final answer
    x = 13,792.82

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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.