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Finding the Fourth Proportional to 15,794.97, 21,797.07 and 8,721.45

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Solution

The fourth proportional to 15,794.97, 21,797.07 and 8,721.45 is: 12,035.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,794.97 : 21,797.07 = 8,721.45 : x
  2. Step 2: Convert to fraction form
    15,794.97/21,797.07 = 8,721.45/x
  3. Step 3: Cross multiply
    15,794.97x = 21,797.07 × 8,721.45
  4. Step 4: Simplify right side
    15,794.97x = 190,102,056.15
  5. Step 5: Solve for x
    x = 190,102,056.15/15,794.97
  6. Step 6: Final answer
    x = 12,035.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.