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Finding the Fourth Proportional to 28,917.03, 43,369.06 and 8,142.15

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Solution

The fourth proportional to 28,917.03, 43,369.06 and 8,142.15 is: 12,211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,917.03 : 43,369.06 = 8,142.15 : x
  2. Step 2: Convert to fraction form
    28,917.03/43,369.06 = 8,142.15/x
  3. Step 3: Cross multiply
    28,917.03x = 43,369.06 × 8,142.15
  4. Step 4: Simplify right side
    28,917.03x = 353,117,391.88
  5. Step 5: Solve for x
    x = 353,117,391.88/28,917.03
  6. Step 6: Final answer
    x = 12,211.40

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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.