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Finding the Fourth Proportional to 6,516.80, 8,992.60 and 3,863.76

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Solution

The fourth proportional to 6,516.80, 8,992.60 and 3,863.76 is: 5,331.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,516.80 : 8,992.60 = 3,863.76 : x
  2. Step 2: Convert to fraction form
    6,516.80/8,992.60 = 3,863.76/x
  3. Step 3: Cross multiply
    6,516.80x = 8,992.60 × 3,863.76
  4. Step 4: Simplify right side
    6,516.80x = 34,745,248.18
  5. Step 5: Solve for x
    x = 34,745,248.18/6,516.80
  6. Step 6: Final answer
    x = 5,331.64

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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.