Home / 6,516.80-8,990.90-3,996.95

Finding the Fourth Proportional to 6,516.80, 8,990.90 and 3,996.95

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Solution

The fourth proportional to 6,516.80, 8,990.90 and 3,996.95 is: 5,514.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,516.80 : 8,990.90 = 3,996.95 : x
  2. Step 2: Convert to fraction form
    6,516.80/8,990.90 = 3,996.95/x
  3. Step 3: Cross multiply
    6,516.80x = 8,990.90 × 3,996.95
  4. Step 4: Simplify right side
    6,516.80x = 35,936,177.76
  5. Step 5: Solve for x
    x = 35,936,177.76/6,516.80
  6. Step 6: Final answer
    x = 5,514.39

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Double scale
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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.