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Finding the Fourth Proportional to 12,608.70, 18,917.10 and 8,453.40

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Solution

The fourth proportional to 12,608.70, 18,917.10 and 8,453.40 is: 12,682.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.70 : 18,917.10 = 8,453.40 : x
  2. Step 2: Convert to fraction form
    12,608.70/18,917.10 = 8,453.40/x
  3. Step 3: Cross multiply
    12,608.70x = 18,917.10 × 8,453.40
  4. Step 4: Simplify right side
    12,608.70x = 159,913,813.14
  5. Step 5: Solve for x
    x = 159,913,813.14/12,608.70
  6. Step 6: Final answer
    x = 12,682.82

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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.