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Finding the Fourth Proportional to 11,419.92, 17,129.62 and 5,263.92

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Solution

The fourth proportional to 11,419.92, 17,129.62 and 5,263.92 is: 7,895.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,419.92 : 17,129.62 = 5,263.92 : x
  2. Step 2: Convert to fraction form
    11,419.92/17,129.62 = 5,263.92/x
  3. Step 3: Cross multiply
    11,419.92x = 17,129.62 × 5,263.92
  4. Step 4: Simplify right side
    11,419.92x = 90,168,949.31
  5. Step 5: Solve for x
    x = 90,168,949.31/11,419.92
  6. Step 6: Final answer
    x = 7,895.76

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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.