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Finding the Fourth Proportional to 18,372.92, 25,362.42 and 12,412.70

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Solution

The fourth proportional to 18,372.92, 25,362.42 and 12,412.70 is: 17,134.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,372.92 : 25,362.42 = 12,412.70 : x
  2. Step 2: Convert to fraction form
    18,372.92/25,362.42 = 12,412.70/x
  3. Step 3: Cross multiply
    18,372.92x = 25,362.42 × 12,412.70
  4. Step 4: Simplify right side
    18,372.92x = 314,816,110.73
  5. Step 5: Solve for x
    x = 314,816,110.73/18,372.92
  6. Step 6: Final answer
    x = 17,134.79

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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.