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Finding the Fourth Proportional to 18,307.28, 27,463.08 and 13,719.44

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Solution

The fourth proportional to 18,307.28, 27,463.08 and 13,719.44 is: 20,580.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,307.28 : 27,463.08 = 13,719.44 : x
  2. Step 2: Convert to fraction form
    18,307.28/27,463.08 = 13,719.44/x
  3. Step 3: Cross multiply
    18,307.28x = 27,463.08 × 13,719.44
  4. Step 4: Simplify right side
    18,307.28x = 376,778,078.28
  5. Step 5: Solve for x
    x = 376,778,078.28/18,307.28
  6. Step 6: Final answer
    x = 20,580.78

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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.