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Finding the Fourth Proportional to 18,687, 25,788.06 and 11,235

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Solution

The fourth proportional to 18,687, 25,788.06 and 11,235 is: 15,504.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687 : 25,788.06 = 11,235 : x
  2. Step 2: Convert to fraction form
    18,687/25,788.06 = 11,235/x
  3. Step 3: Cross multiply
    18,687x = 25,788.06 × 11,235
  4. Step 4: Simplify right side
    18,687x = 289,728,854.10
  5. Step 5: Solve for x
    x = 289,728,854.10/18,687
  6. Step 6: Final answer
    x = 15,504.30

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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.