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Finding the Fourth Proportional to 18,644.88, 25,731.05 and 10,687.62

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Solution

The fourth proportional to 18,644.88, 25,731.05 and 10,687.62 is: 14,749.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,644.88 : 25,731.05 = 10,687.62 : x
  2. Step 2: Convert to fraction form
    18,644.88/25,731.05 = 10,687.62/x
  3. Step 3: Cross multiply
    18,644.88x = 25,731.05 × 10,687.62
  4. Step 4: Simplify right side
    18,644.88x = 275,003,684.60
  5. Step 5: Solve for x
    x = 275,003,684.60/18,644.88
  6. Step 6: Final answer
    x = 14,749.56

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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.