Home / 12,819.57-19,226.91-5,429.21

Finding the Fourth Proportional to 12,819.57, 19,226.91 and 5,429.21

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Solution

The fourth proportional to 12,819.57, 19,226.91 and 5,429.21 is: 8,142.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,819.57 : 19,226.91 = 5,429.21 : x
  2. Step 2: Convert to fraction form
    12,819.57/19,226.91 = 5,429.21/x
  3. Step 3: Cross multiply
    12,819.57x = 19,226.91 × 5,429.21
  4. Step 4: Simplify right side
    12,819.57x = 104,386,949.15
  5. Step 5: Solve for x
    x = 104,386,949.15/12,819.57
  6. Step 6: Final answer
    x = 8,142.78

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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.