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Finding the Fourth Proportional to 13,287, 19,939.14 and 5,079

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Solution

The fourth proportional to 13,287, 19,939.14 and 5,079 is: 7,621.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287 : 19,939.14 = 5,079 : x
  2. Step 2: Convert to fraction form
    13,287/19,939.14 = 5,079/x
  3. Step 3: Cross multiply
    13,287x = 19,939.14 × 5,079
  4. Step 4: Simplify right side
    13,287x = 101,270,892.06
  5. Step 5: Solve for x
    x = 101,270,892.06/13,287
  6. Step 6: Final answer
    x = 7,621.80

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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.