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Finding the Fourth Proportional to 18,243.78, 25,175.70 and 10,285.50

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Solution

The fourth proportional to 18,243.78, 25,175.70 and 10,285.50 is: 14,193.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,243.78 : 25,175.70 = 10,285.50 : x
  2. Step 2: Convert to fraction form
    18,243.78/25,175.70 = 10,285.50/x
  3. Step 3: Cross multiply
    18,243.78x = 25,175.70 × 10,285.50
  4. Step 4: Simplify right side
    18,243.78x = 258,944,662.35
  5. Step 5: Solve for x
    x = 258,944,662.35/18,243.78
  6. Step 6: Final answer
    x = 14,193.59

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1.5x scale

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.