Home / 12,318.89-18,478.63-3,553.88

Finding the Fourth Proportional to 12,318.89, 18,478.63 and 3,553.88

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Solution

The fourth proportional to 12,318.89, 18,478.63 and 3,553.88 is: 5,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.89 : 18,478.63 = 3,553.88 : x
  2. Step 2: Convert to fraction form
    12,318.89/18,478.63 = 3,553.88/x
  3. Step 3: Cross multiply
    12,318.89x = 18,478.63 × 3,553.88
  4. Step 4: Simplify right side
    12,318.89x = 65,670,745.63
  5. Step 5: Solve for x
    x = 65,670,745.63/12,318.89
  6. Step 6: Final answer
    x = 5,330.90

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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.