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Finding the Fourth Proportional to 7,956.50, 10,979.97 and 4,815.14

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Solution

The fourth proportional to 7,956.50, 10,979.97 and 4,815.14 is: 6,644.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,956.50 : 10,979.97 = 4,815.14 : x
  2. Step 2: Convert to fraction form
    7,956.50/10,979.97 = 4,815.14/x
  3. Step 3: Cross multiply
    7,956.50x = 10,979.97 × 4,815.14
  4. Step 4: Simplify right side
    7,956.50x = 52,870,092.75
  5. Step 5: Solve for x
    x = 52,870,092.75/7,956.50
  6. Step 6: Final answer
    x = 6,644.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.