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Finding the Fourth Proportional to 16,872.60, 25,308.90 and 8,105.40

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Solution

The fourth proportional to 16,872.60, 25,308.90 and 8,105.40 is: 12,158.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,872.60 : 25,308.90 = 8,105.40 : x
  2. Step 2: Convert to fraction form
    16,872.60/25,308.90 = 8,105.40/x
  3. Step 3: Cross multiply
    16,872.60x = 25,308.90 × 8,105.40
  4. Step 4: Simplify right side
    16,872.60x = 205,138,758.06
  5. Step 5: Solve for x
    x = 205,138,758.06/16,872.60
  6. Step 6: Final answer
    x = 12,158.10

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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.