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Finding the Fourth Proportional to 18,372.40, 25,358.52 and 10,419.38

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Solution

The fourth proportional to 18,372.40, 25,358.52 and 10,419.38 is: 14,381.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,372.40 : 25,358.52 = 10,419.38 : x
  2. Step 2: Convert to fraction form
    18,372.40/25,358.52 = 10,419.38/x
  3. Step 3: Cross multiply
    18,372.40x = 25,358.52 × 10,419.38
  4. Step 4: Simplify right side
    18,372.40x = 264,220,056.12
  5. Step 5: Solve for x
    x = 264,220,056.12/18,372.40
  6. Step 6: Final answer
    x = 14,381.36

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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.