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Finding the Fourth Proportional to 18,751.38, 25,877.56 and 11,203.50

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Solution

The fourth proportional to 18,751.38, 25,877.56 and 11,203.50 is: 15,461.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.38 : 25,877.56 = 11,203.50 : x
  2. Step 2: Convert to fraction form
    18,751.38/25,877.56 = 11,203.50/x
  3. Step 3: Cross multiply
    18,751.38x = 25,877.56 × 11,203.50
  4. Step 4: Simplify right side
    18,751.38x = 289,919,243.46
  5. Step 5: Solve for x
    x = 289,919,243.46/18,751.38
  6. Step 6: Final answer
    x = 15,461.22

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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.