Home / 12,318.10-18,478.06-3,553.70

Finding the Fourth Proportional to 12,318.10, 18,478.06 and 3,553.70

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Solution

The fourth proportional to 12,318.10, 18,478.06 and 3,553.70 is: 5,330.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.10 : 18,478.06 = 3,553.70 : x
  2. Step 2: Convert to fraction form
    12,318.10/18,478.06 = 3,553.70/x
  3. Step 3: Cross multiply
    12,318.10x = 18,478.06 × 3,553.70
  4. Step 4: Simplify right side
    12,318.10x = 65,665,380.55
  5. Step 5: Solve for x
    x = 65,665,380.55/12,318.10
  6. Step 6: Final answer
    x = 5,330.81

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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.