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Finding the Fourth Proportional to 8,516.76, 12,782.88 and 4,359.64

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Solution

The fourth proportional to 8,516.76, 12,782.88 and 4,359.64 is: 6,543.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,516.76 : 12,782.88 = 4,359.64 : x
  2. Step 2: Convert to fraction form
    8,516.76/12,782.88 = 4,359.64/x
  3. Step 3: Cross multiply
    8,516.76x = 12,782.88 × 4,359.64
  4. Step 4: Simplify right side
    8,516.76x = 55,728,754.96
  5. Step 5: Solve for x
    x = 55,728,754.96/8,516.76
  6. Step 6: Final answer
    x = 6,543.42

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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.