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Finding the Fourth Proportional to 12,101.73, 18,141.66 and 8,405.70

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Solution

The fourth proportional to 12,101.73, 18,141.66 and 8,405.70 is: 12,600.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,101.73 : 18,141.66 = 8,405.70 : x
  2. Step 2: Convert to fraction form
    12,101.73/18,141.66 = 8,405.70/x
  3. Step 3: Cross multiply
    12,101.73x = 18,141.66 × 8,405.70
  4. Step 4: Simplify right side
    12,101.73x = 152,493,351.46
  5. Step 5: Solve for x
    x = 152,493,351.46/12,101.73
  6. Step 6: Final answer
    x = 12,600.95

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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.