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Finding the Fourth Proportional to 12,738.80, 19,108.20 and 8,850.80

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Solution

The fourth proportional to 12,738.80, 19,108.20 and 8,850.80 is: 13,276.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,738.80 : 19,108.20 = 8,850.80 : x
  2. Step 2: Convert to fraction form
    12,738.80/19,108.20 = 8,850.80/x
  3. Step 3: Cross multiply
    12,738.80x = 19,108.20 × 8,850.80
  4. Step 4: Simplify right side
    12,738.80x = 169,122,856.56
  5. Step 5: Solve for x
    x = 169,122,856.56/12,738.80
  6. Step 6: Final answer
    x = 13,276.20

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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.