Home / 12,219.22-18,317.49-4,423.78

Finding the Fourth Proportional to 12,219.22, 18,317.49 and 4,423.78

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Solution

The fourth proportional to 12,219.22, 18,317.49 and 4,423.78 is: 6,631.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.22 : 18,317.49 = 4,423.78 : x
  2. Step 2: Convert to fraction form
    12,219.22/18,317.49 = 4,423.78/x
  3. Step 3: Cross multiply
    12,219.22x = 18,317.49 × 4,423.78
  4. Step 4: Simplify right side
    12,219.22x = 81,032,545.91
  5. Step 5: Solve for x
    x = 81,032,545.91/12,219.22
  6. Step 6: Final answer
    x = 6,631.56

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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.