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Finding the Fourth Proportional to 18,702.20, 25,811.31 and 10,744.40

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Solution

The fourth proportional to 18,702.20, 25,811.31 and 10,744.40 is: 14,828.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.20 : 25,811.31 = 10,744.40 : x
  2. Step 2: Convert to fraction form
    18,702.20/25,811.31 = 10,744.40/x
  3. Step 3: Cross multiply
    18,702.20x = 25,811.31 × 10,744.40
  4. Step 4: Simplify right side
    18,702.20x = 277,327,039.16
  5. Step 5: Solve for x
    x = 277,327,039.16/18,702.20
  6. Step 6: Final answer
    x = 14,828.58

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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.