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Finding the Fourth Proportional to 12,675.70, 18,977.10 and 11,217.70

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Solution

The fourth proportional to 12,675.70, 18,977.10 and 11,217.70 is: 16,794.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,675.70 : 18,977.10 = 11,217.70 : x
  2. Step 2: Convert to fraction form
    12,675.70/18,977.10 = 11,217.70/x
  3. Step 3: Cross multiply
    12,675.70x = 18,977.10 × 11,217.70
  4. Step 4: Simplify right side
    12,675.70x = 212,879,414.67
  5. Step 5: Solve for x
    x = 212,879,414.67/12,675.70
  6. Step 6: Final answer
    x = 16,794.29

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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.