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Finding the Fourth Proportional to 18,812.52, 28,228.05 and 13,301.28

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Solution

The fourth proportional to 18,812.52, 28,228.05 and 13,301.28 is: 19,958.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.52 : 28,228.05 = 13,301.28 : x
  2. Step 2: Convert to fraction form
    18,812.52/28,228.05 = 13,301.28/x
  3. Step 3: Cross multiply
    18,812.52x = 28,228.05 × 13,301.28
  4. Step 4: Simplify right side
    18,812.52x = 375,469,196.90
  5. Step 5: Solve for x
    x = 375,469,196.90/18,812.52
  6. Step 6: Final answer
    x = 19,958.47

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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.