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Finding the Fourth Proportional to 11,813.92, 17,721.84 and 4,316.64

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Solution

The fourth proportional to 11,813.92, 17,721.84 and 4,316.64 is: 6,475.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,813.92 : 17,721.84 = 4,316.64 : x
  2. Step 2: Convert to fraction form
    11,813.92/17,721.84 = 4,316.64/x
  3. Step 3: Cross multiply
    11,813.92x = 17,721.84 × 4,316.64
  4. Step 4: Simplify right side
    11,813.92x = 76,498,803.42
  5. Step 5: Solve for x
    x = 76,498,803.42/11,813.92
  6. Step 6: Final answer
    x = 6,475.31

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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.