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Finding the Fourth Proportional to 20,595.24, 30,905.82 and 12,819.24

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Solution

The fourth proportional to 20,595.24, 30,905.82 and 12,819.24 is: 19,236.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,595.24 : 30,905.82 = 12,819.24 : x
  2. Step 2: Convert to fraction form
    20,595.24/30,905.82 = 12,819.24/x
  3. Step 3: Cross multiply
    20,595.24x = 30,905.82 × 12,819.24
  4. Step 4: Simplify right side
    20,595.24x = 396,189,123.98
  5. Step 5: Solve for x
    x = 396,189,123.98/20,595.24
  6. Step 6: Final answer
    x = 19,236.93

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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.