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Finding the Fourth Proportional to 18,772.78, 25,899.08 and 12,057.48

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Solution

The fourth proportional to 18,772.78, 25,899.08 and 12,057.48 is: 16,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.78 : 25,899.08 = 12,057.48 : x
  2. Step 2: Convert to fraction form
    18,772.78/25,899.08 = 12,057.48/x
  3. Step 3: Cross multiply
    18,772.78x = 25,899.08 × 12,057.48
  4. Step 4: Simplify right side
    18,772.78x = 312,277,639.12
  5. Step 5: Solve for x
    x = 312,277,639.12/18,772.78
  6. Step 6: Final answer
    x = 16,634.60

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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.