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Finding the Fourth Proportional to 12,562.57, 18,836.99 and 8,119.61

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Solution

The fourth proportional to 12,562.57, 18,836.99 and 8,119.61 is: 12,174.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,562.57 : 18,836.99 = 8,119.61 : x
  2. Step 2: Convert to fraction form
    12,562.57/18,836.99 = 8,119.61/x
  3. Step 3: Cross multiply
    12,562.57x = 18,836.99 × 8,119.61
  4. Step 4: Simplify right side
    12,562.57x = 152,949,012.37
  5. Step 5: Solve for x
    x = 152,949,012.37/12,562.57
  6. Step 6: Final answer
    x = 12,174.98

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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.