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Finding the Fourth Proportional to 13,243.56, 18,275.85 and 7,275.09

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Solution

The fourth proportional to 13,243.56, 18,275.85 and 7,275.09 is: 10,039.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,243.56 : 18,275.85 = 7,275.09 : x
  2. Step 2: Convert to fraction form
    13,243.56/18,275.85 = 7,275.09/x
  3. Step 3: Cross multiply
    13,243.56x = 18,275.85 × 7,275.09
  4. Step 4: Simplify right side
    13,243.56x = 132,958,453.58
  5. Step 5: Solve for x
    x = 132,958,453.58/13,243.56
  6. Step 6: Final answer
    x = 10,039.48

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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.