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Finding the Fourth Proportional to 15,793.22, 21,792.88 and 8,717.87

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Solution

The fourth proportional to 15,793.22, 21,792.88 and 8,717.87 is: 12,029.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,793.22 : 21,792.88 = 8,717.87 : x
  2. Step 2: Convert to fraction form
    15,793.22/21,792.88 = 8,717.87/x
  3. Step 3: Cross multiply
    15,793.22x = 21,792.88 × 8,717.87
  4. Step 4: Simplify right side
    15,793.22x = 189,987,560.15
  5. Step 5: Solve for x
    x = 189,987,560.15/15,793.22
  6. Step 6: Final answer
    x = 12,029.69

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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.