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Finding the Fourth Proportional to 18,657.63, 25,748.17 and 10,159.90

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Solution

The fourth proportional to 18,657.63, 25,748.17 and 10,159.90 is: 14,021.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.63 : 25,748.17 = 10,159.90 : x
  2. Step 2: Convert to fraction form
    18,657.63/25,748.17 = 10,159.90/x
  3. Step 3: Cross multiply
    18,657.63x = 25,748.17 × 10,159.90
  4. Step 4: Simplify right side
    18,657.63x = 261,598,877.27
  5. Step 5: Solve for x
    x = 261,598,877.27/18,657.63
  6. Step 6: Final answer
    x = 14,021.01

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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.