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Finding the Fourth Proportional to 19,213.80, 28,826.10 and 8,125.80

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Solution

The fourth proportional to 19,213.80, 28,826.10 and 8,125.80 is: 12,190.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,213.80 : 28,826.10 = 8,125.80 : x
  2. Step 2: Convert to fraction form
    19,213.80/28,826.10 = 8,125.80/x
  3. Step 3: Cross multiply
    19,213.80x = 28,826.10 × 8,125.80
  4. Step 4: Simplify right side
    19,213.80x = 234,235,123.38
  5. Step 5: Solve for x
    x = 234,235,123.38/19,213.80
  6. Step 6: Final answer
    x = 12,190.98

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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.