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Finding the Fourth Proportional to 11,920.52, 17,880.80 and 4,129.34

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Solution

The fourth proportional to 11,920.52, 17,880.80 and 4,129.34 is: 6,194.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.52 : 17,880.80 = 4,129.34 : x
  2. Step 2: Convert to fraction form
    11,920.52/17,880.80 = 4,129.34/x
  3. Step 3: Cross multiply
    11,920.52x = 17,880.80 × 4,129.34
  4. Step 4: Simplify right side
    11,920.52x = 73,835,792.62
  5. Step 5: Solve for x
    x = 73,835,792.62/11,920.52
  6. Step 6: Final answer
    x = 6,194.01

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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.