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Finding the Fourth Proportional to 17,221.92, 25,830.96 and 4,742.88

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Solution

The fourth proportional to 17,221.92, 25,830.96 and 4,742.88 is: 7,113.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,221.92 : 25,830.96 = 4,742.88 : x
  2. Step 2: Convert to fraction form
    17,221.92/25,830.96 = 4,742.88/x
  3. Step 3: Cross multiply
    17,221.92x = 25,830.96 × 4,742.88
  4. Step 4: Simplify right side
    17,221.92x = 122,513,143.56
  5. Step 5: Solve for x
    x = 122,513,143.56/17,221.92
  6. Step 6: Final answer
    x = 7,113.79

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1.5x scale

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.