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Finding the Fourth Proportional to 8,665.52, 12,998.30 and 2,091.69

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Solution

The fourth proportional to 8,665.52, 12,998.30 and 2,091.69 is: 3,137.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.52 : 12,998.30 = 2,091.69 : x
  2. Step 2: Convert to fraction form
    8,665.52/12,998.30 = 2,091.69/x
  3. Step 3: Cross multiply
    8,665.52x = 12,998.30 × 2,091.69
  4. Step 4: Simplify right side
    8,665.52x = 27,188,403.67
  5. Step 5: Solve for x
    x = 27,188,403.67/8,665.52
  6. Step 6: Final answer
    x = 3,137.54

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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.