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Finding the Fourth Proportional to 18,371.79, 25,348.64 and 11,655

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Solution

The fourth proportional to 18,371.79, 25,348.64 and 11,655 is: 16,081.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.79 : 25,348.64 = 11,655 : x
  2. Step 2: Convert to fraction form
    18,371.79/25,348.64 = 11,655/x
  3. Step 3: Cross multiply
    18,371.79x = 25,348.64 × 11,655
  4. Step 4: Simplify right side
    18,371.79x = 295,438,340.93
  5. Step 5: Solve for x
    x = 295,438,340.93/18,371.79
  6. Step 6: Final answer
    x = 16,081.09

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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.