Home / 12,429.78-18,639.09-3,661.62

Finding the Fourth Proportional to 12,429.78, 18,639.09 and 3,661.62

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Solution

The fourth proportional to 12,429.78, 18,639.09 and 3,661.62 is: 5,490.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.78 : 18,639.09 = 3,661.62 : x
  2. Step 2: Convert to fraction form
    12,429.78/18,639.09 = 3,661.62/x
  3. Step 3: Cross multiply
    12,429.78x = 18,639.09 × 3,661.62
  4. Step 4: Simplify right side
    12,429.78x = 68,249,264.73
  5. Step 5: Solve for x
    x = 68,249,264.73/12,429.78
  6. Step 6: Final answer
    x = 5,490.79

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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.