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Finding the Fourth Proportional to 12,620.92, 18,933.66 and 8,487.40

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Solution

The fourth proportional to 12,620.92, 18,933.66 and 8,487.40 is: 12,732.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.92 : 18,933.66 = 8,487.40 : x
  2. Step 2: Convert to fraction form
    12,620.92/18,933.66 = 8,487.40/x
  3. Step 3: Cross multiply
    12,620.92x = 18,933.66 × 8,487.40
  4. Step 4: Simplify right side
    12,620.92x = 160,697,545.88
  5. Step 5: Solve for x
    x = 160,697,545.88/12,620.92
  6. Step 6: Final answer
    x = 12,732.63

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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.