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Finding the Fourth Proportional to 13,419.92, 20,127.12 and 4,651.88

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Solution

The fourth proportional to 13,419.92, 20,127.12 and 4,651.88 is: 6,976.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.92 : 20,127.12 = 4,651.88 : x
  2. Step 2: Convert to fraction form
    13,419.92/20,127.12 = 4,651.88/x
  3. Step 3: Cross multiply
    13,419.92x = 20,127.12 × 4,651.88
  4. Step 4: Simplify right side
    13,419.92x = 93,628,946.99
  5. Step 5: Solve for x
    x = 93,628,946.99/13,419.92
  6. Step 6: Final answer
    x = 6,976.86

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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.