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Finding the Fourth Proportional to 18,562, 25,621.32 and 11,938

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Solution

The fourth proportional to 18,562, 25,621.32 and 11,938 is: 16,478.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,562 : 25,621.32 = 11,938 : x
  2. Step 2: Convert to fraction form
    18,562/25,621.32 = 11,938/x
  3. Step 3: Cross multiply
    18,562x = 25,621.32 × 11,938
  4. Step 4: Simplify right side
    18,562x = 305,867,318.16
  5. Step 5: Solve for x
    x = 305,867,318.16/18,562
  6. Step 6: Final answer
    x = 16,478.14

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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.