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Finding the Fourth Proportional to 5,516.16, 8,276.80 and 5,428.80

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Solution

The fourth proportional to 5,516.16, 8,276.80 and 5,428.80 is: 8,145.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,516.16 : 8,276.80 = 5,428.80 : x
  2. Step 2: Convert to fraction form
    5,516.16/8,276.80 = 5,428.80/x
  3. Step 3: Cross multiply
    5,516.16x = 8,276.80 × 5,428.80
  4. Step 4: Simplify right side
    5,516.16x = 44,933,091.84
  5. Step 5: Solve for x
    x = 44,933,091.84/5,516.16
  6. Step 6: Final answer
    x = 8,145.72

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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.