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Finding the Fourth Proportional to 8,628.34, 12,930.12 and 3,696.64

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Solution

The fourth proportional to 8,628.34, 12,930.12 and 3,696.64 is: 5,539.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.34 : 12,930.12 = 3,696.64 : x
  2. Step 2: Convert to fraction form
    8,628.34/12,930.12 = 3,696.64/x
  3. Step 3: Cross multiply
    8,628.34x = 12,930.12 × 3,696.64
  4. Step 4: Simplify right side
    8,628.34x = 47,797,998.80
  5. Step 5: Solve for x
    x = 47,797,998.80/8,628.34
  6. Step 6: Final answer
    x = 5,539.65

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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.