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Finding the Fourth Proportional to 18,636, 25,704.66 and 12,260.58

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Solution

The fourth proportional to 18,636, 25,704.66 and 12,260.58 is: 16,911.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636 : 25,704.66 = 12,260.58 : x
  2. Step 2: Convert to fraction form
    18,636/25,704.66 = 12,260.58/x
  3. Step 3: Cross multiply
    18,636x = 25,704.66 × 12,260.58
  4. Step 4: Simplify right side
    18,636x = 315,154,040.30
  5. Step 5: Solve for x
    x = 315,154,040.30/18,636
  6. Step 6: Final answer
    x = 16,911.03

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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.