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Finding the Fourth Proportional to 11,812.78, 17,719.14 and 3,604.78

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Solution

The fourth proportional to 11,812.78, 17,719.14 and 3,604.78 is: 5,407.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,812.78 : 17,719.14 = 3,604.78 : x
  2. Step 2: Convert to fraction form
    11,812.78/17,719.14 = 3,604.78/x
  3. Step 3: Cross multiply
    11,812.78x = 17,719.14 × 3,604.78
  4. Step 4: Simplify right side
    11,812.78x = 63,873,601.49
  5. Step 5: Solve for x
    x = 63,873,601.49/11,812.78
  6. Step 6: Final answer
    x = 5,407.16

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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.