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Finding the Fourth Proportional to 12,914.80, 19,372.20 and 11,225.20

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Solution

The fourth proportional to 12,914.80, 19,372.20 and 11,225.20 is: 16,837.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,914.80 : 19,372.20 = 11,225.20 : x
  2. Step 2: Convert to fraction form
    12,914.80/19,372.20 = 11,225.20/x
  3. Step 3: Cross multiply
    12,914.80x = 19,372.20 × 11,225.20
  4. Step 4: Simplify right side
    12,914.80x = 217,456,819.44
  5. Step 5: Solve for x
    x = 217,456,819.44/12,914.80
  6. Step 6: Final answer
    x = 16,837.80

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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.