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Finding the Fourth Proportional to 16,917.80, 25,392.90 and 8,607.20

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Solution

The fourth proportional to 16,917.80, 25,392.90 and 8,607.20 is: 12,919.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,917.80 : 25,392.90 = 8,607.20 : x
  2. Step 2: Convert to fraction form
    16,917.80/25,392.90 = 8,607.20/x
  3. Step 3: Cross multiply
    16,917.80x = 25,392.90 × 8,607.20
  4. Step 4: Simplify right side
    16,917.80x = 218,561,768.88
  5. Step 5: Solve for x
    x = 218,561,768.88/16,917.80
  6. Step 6: Final answer
    x = 12,919.04

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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.