Home / 12,815.70-19,226.78-3,581.70

Finding the Fourth Proportional to 12,815.70, 19,226.78 and 3,581.70

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Solution

The fourth proportional to 12,815.70, 19,226.78 and 3,581.70 is: 5,373.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.70 : 19,226.78 = 3,581.70 : x
  2. Step 2: Convert to fraction form
    12,815.70/19,226.78 = 3,581.70/x
  3. Step 3: Cross multiply
    12,815.70x = 19,226.78 × 3,581.70
  4. Step 4: Simplify right side
    12,815.70x = 68,864,557.93
  5. Step 5: Solve for x
    x = 68,864,557.93/12,815.70
  6. Step 6: Final answer
    x = 5,373.45

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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.