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Finding the Fourth Proportional to 11,578.95, 15,979.48 and 7,101.68

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Solution

The fourth proportional to 11,578.95, 15,979.48 and 7,101.68 is: 9,800.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,578.95 : 15,979.48 = 7,101.68 : x
  2. Step 2: Convert to fraction form
    11,578.95/15,979.48 = 7,101.68/x
  3. Step 3: Cross multiply
    11,578.95x = 15,979.48 × 7,101.68
  4. Step 4: Simplify right side
    11,578.95x = 113,481,055.87
  5. Step 5: Solve for x
    x = 113,481,055.87/11,578.95
  6. Step 6: Final answer
    x = 9,800.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.