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Finding the Fourth Proportional to 13,530.45, 18,673.78 and 7,563.36

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Solution

The fourth proportional to 13,530.45, 18,673.78 and 7,563.36 is: 10,438.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,530.45 : 18,673.78 = 7,563.36 : x
  2. Step 2: Convert to fraction form
    13,530.45/18,673.78 = 7,563.36/x
  3. Step 3: Cross multiply
    13,530.45x = 18,673.78 × 7,563.36
  4. Step 4: Simplify right side
    13,530.45x = 141,236,520.70
  5. Step 5: Solve for x
    x = 141,236,520.70/13,530.45
  6. Step 6: Final answer
    x = 10,438.42

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.