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Finding the Fourth Proportional to 7,769.92, 10,720.72 and 6,516.04

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Solution

The fourth proportional to 7,769.92, 10,720.72 and 6,516.04 is: 8,990.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,769.92 : 10,720.72 = 6,516.04 : x
  2. Step 2: Convert to fraction form
    7,769.92/10,720.72 = 6,516.04/x
  3. Step 3: Cross multiply
    7,769.92x = 10,720.72 × 6,516.04
  4. Step 4: Simplify right side
    7,769.92x = 69,856,640.35
  5. Step 5: Solve for x
    x = 69,856,640.35/7,769.92
  6. Step 6: Final answer
    x = 8,990.65

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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.