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Finding the Fourth Proportional to 13,141.20, 19,717.20 and 4,825.20

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Solution

The fourth proportional to 13,141.20, 19,717.20 and 4,825.20 is: 7,239.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.20 : 19,717.20 = 4,825.20 : x
  2. Step 2: Convert to fraction form
    13,141.20/19,717.20 = 4,825.20/x
  3. Step 3: Cross multiply
    13,141.20x = 19,717.20 × 4,825.20
  4. Step 4: Simplify right side
    13,141.20x = 95,139,433.44
  5. Step 5: Solve for x
    x = 95,139,433.44/13,141.20
  6. Step 6: Final answer
    x = 7,239.78

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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.