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Finding the Fourth Proportional to 8,609.69, 12,884.25 and 5,276.90

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Solution

The fourth proportional to 8,609.69, 12,884.25 and 5,276.90 is: 7,896.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.69 : 12,884.25 = 5,276.90 : x
  2. Step 2: Convert to fraction form
    8,609.69/12,884.25 = 5,276.90/x
  3. Step 3: Cross multiply
    8,609.69x = 12,884.25 × 5,276.90
  4. Step 4: Simplify right side
    8,609.69x = 67,988,898.83
  5. Step 5: Solve for x
    x = 67,988,898.83/8,609.69
  6. Step 6: Final answer
    x = 7,896.79

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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.