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Finding the Fourth Proportional to 6,516.80, 8,990.82 and 4,279.88

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Solution

The fourth proportional to 6,516.80, 8,990.82 and 4,279.88 is: 5,904.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,516.80 : 8,990.82 = 4,279.88 : x
  2. Step 2: Convert to fraction form
    6,516.80/8,990.82 = 4,279.88/x
  3. Step 3: Cross multiply
    6,516.80x = 8,990.82 × 4,279.88
  4. Step 4: Simplify right side
    6,516.80x = 38,479,653.18
  5. Step 5: Solve for x
    x = 38,479,653.18/6,516.80
  6. Step 6: Final answer
    x = 5,904.69

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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.