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Finding the Fourth Proportional to 6,660.80, 9,976.80 and 6,516.80

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Solution

The fourth proportional to 6,660.80, 9,976.80 and 6,516.80 is: 9,761.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,660.80 : 9,976.80 = 6,516.80 : x
  2. Step 2: Convert to fraction form
    6,660.80/9,976.80 = 6,516.80/x
  3. Step 3: Cross multiply
    6,660.80x = 9,976.80 × 6,516.80
  4. Step 4: Simplify right side
    6,660.80x = 65,016,810.24
  5. Step 5: Solve for x
    x = 65,016,810.24/6,660.80
  6. Step 6: Final answer
    x = 9,761.11

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1.5x scale

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.