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Finding the Fourth Proportional to 8,639.52, 11,911.64 and 5,650.62

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Solution

The fourth proportional to 8,639.52, 11,911.64 and 5,650.62 is: 7,790.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.52 : 11,911.64 = 5,650.62 : x
  2. Step 2: Convert to fraction form
    8,639.52/11,911.64 = 5,650.62/x
  3. Step 3: Cross multiply
    8,639.52x = 11,911.64 × 5,650.62
  4. Step 4: Simplify right side
    8,639.52x = 67,308,151.22
  5. Step 5: Solve for x
    x = 67,308,151.22/8,639.52
  6. Step 6: Final answer
    x = 7,790.73

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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.