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Finding the Fourth Proportional to 18,376.79, 25,355.54 and 11,660

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Solution

The fourth proportional to 18,376.79, 25,355.54 and 11,660 is: 16,087.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,376.79 : 25,355.54 = 11,660 : x
  2. Step 2: Convert to fraction form
    18,376.79/25,355.54 = 11,660/x
  3. Step 3: Cross multiply
    18,376.79x = 25,355.54 × 11,660
  4. Step 4: Simplify right side
    18,376.79x = 295,645,538.10
  5. Step 5: Solve for x
    x = 295,645,538.10/18,376.79
  6. Step 6: Final answer
    x = 16,087.99

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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.