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Finding the Fourth Proportional to 13,276.72, 18,321.74 and 7,308.23

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Solution

The fourth proportional to 13,276.72, 18,321.74 and 7,308.23 is: 10,085.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,276.72 : 18,321.74 = 7,308.23 : x
  2. Step 2: Convert to fraction form
    13,276.72/18,321.74 = 7,308.23/x
  3. Step 3: Cross multiply
    13,276.72x = 18,321.74 × 7,308.23
  4. Step 4: Simplify right side
    13,276.72x = 133,899,489.92
  5. Step 5: Solve for x
    x = 133,899,489.92/13,276.72
  6. Step 6: Final answer
    x = 10,085.29

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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.