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Finding the Fourth Proportional to 8,979.46, 13,475.67 and 5,091.46

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Solution

The fourth proportional to 8,979.46, 13,475.67 and 5,091.46 is: 7,640.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.46 : 13,475.67 = 5,091.46 : x
  2. Step 2: Convert to fraction form
    8,979.46/13,475.67 = 5,091.46/x
  3. Step 3: Cross multiply
    8,979.46x = 13,475.67 × 5,091.46
  4. Step 4: Simplify right side
    8,979.46x = 68,610,834.78
  5. Step 5: Solve for x
    x = 68,610,834.78/8,979.46
  6. Step 6: Final answer
    x = 7,640.86

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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.