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Finding the Fourth Proportional to 14,103.92, 21,157.68 and 4,739.92

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Solution

The fourth proportional to 14,103.92, 21,157.68 and 4,739.92 is: 7,110.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,103.92 : 21,157.68 = 4,739.92 : x
  2. Step 2: Convert to fraction form
    14,103.92/21,157.68 = 4,739.92/x
  3. Step 3: Cross multiply
    14,103.92x = 21,157.68 × 4,739.92
  4. Step 4: Simplify right side
    14,103.92x = 100,285,710.59
  5. Step 5: Solve for x
    x = 100,285,710.59/14,103.92
  6. Step 6: Final answer
    x = 7,110.48

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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.