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Finding the Fourth Proportional to 17,321.19, 25,981.79 and 9,920.52

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Solution

The fourth proportional to 17,321.19, 25,981.79 and 9,920.52 is: 14,880.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,321.19 : 25,981.79 = 9,920.52 : x
  2. Step 2: Convert to fraction form
    17,321.19/25,981.79 = 9,920.52/x
  3. Step 3: Cross multiply
    17,321.19x = 25,981.79 × 9,920.52
  4. Step 4: Simplify right side
    17,321.19x = 257,752,817.73
  5. Step 5: Solve for x
    x = 257,752,817.73/17,321.19
  6. Step 6: Final answer
    x = 14,880.78

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Similar ratio
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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.