Home / 12,278.70-18,418.05-4,490.55

Finding the Fourth Proportional to 12,278.70, 18,418.05 and 4,490.55

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Solution

The fourth proportional to 12,278.70, 18,418.05 and 4,490.55 is: 6,735.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.70 : 18,418.05 = 4,490.55 : x
  2. Step 2: Convert to fraction form
    12,278.70/18,418.05 = 4,490.55/x
  3. Step 3: Cross multiply
    12,278.70x = 18,418.05 × 4,490.55
  4. Step 4: Simplify right side
    12,278.70x = 82,707,174.43
  5. Step 5: Solve for x
    x = 82,707,174.43/12,278.70
  6. Step 6: Final answer
    x = 6,735.83

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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.