Home / 12,819.22-19,226.40-5,428.87

Finding the Fourth Proportional to 12,819.22, 19,226.40 and 5,428.87

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Solution

The fourth proportional to 12,819.22, 19,226.40 and 5,428.87 is: 8,142.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,819.22 : 19,226.40 = 5,428.87 : x
  2. Step 2: Convert to fraction form
    12,819.22/19,226.40 = 5,428.87/x
  3. Step 3: Cross multiply
    12,819.22x = 19,226.40 × 5,428.87
  4. Step 4: Simplify right side
    12,819.22x = 104,377,502.89
  5. Step 5: Solve for x
    x = 104,377,502.89/12,819.22
  6. Step 6: Final answer
    x = 8,142.27

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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.