Home / 12,420.82-18,631.41-3,653.74

Finding the Fourth Proportional to 12,420.82, 18,631.41 and 3,653.74

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Solution

The fourth proportional to 12,420.82, 18,631.41 and 3,653.74 is: 5,480.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.82 : 18,631.41 = 3,653.74 : x
  2. Step 2: Convert to fraction form
    12,420.82/18,631.41 = 3,653.74/x
  3. Step 3: Cross multiply
    12,420.82x = 18,631.41 × 3,653.74
  4. Step 4: Simplify right side
    12,420.82x = 68,074,327.97
  5. Step 5: Solve for x
    x = 68,074,327.97/12,420.82
  6. Step 6: Final answer
    x = 5,480.66

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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.