Home / 12,318.90-18,480.78-3,553.92

Finding the Fourth Proportional to 12,318.90, 18,480.78 and 3,553.92

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Solution

The fourth proportional to 12,318.90, 18,480.78 and 3,553.92 is: 5,331.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.90 : 18,480.78 = 3,553.92 : x
  2. Step 2: Convert to fraction form
    12,318.90/18,480.78 = 3,553.92/x
  3. Step 3: Cross multiply
    12,318.90x = 18,480.78 × 3,553.92
  4. Step 4: Simplify right side
    12,318.90x = 65,679,213.66
  5. Step 5: Solve for x
    x = 65,679,213.66/12,318.90
  6. Step 6: Final answer
    x = 5,331.58

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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.