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Finding the Fourth Proportional to 18,551.28, 27,828.21 and 7,457.97

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Solution

The fourth proportional to 18,551.28, 27,828.21 and 7,457.97 is: 11,187.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,551.28 : 27,828.21 = 7,457.97 : x
  2. Step 2: Convert to fraction form
    18,551.28/27,828.21 = 7,457.97/x
  3. Step 3: Cross multiply
    18,551.28x = 27,828.21 × 7,457.97
  4. Step 4: Simplify right side
    18,551.28x = 207,541,918.04
  5. Step 5: Solve for x
    x = 207,541,918.04/18,551.28
  6. Step 6: Final answer
    x = 11,187.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.