Home / 12,815.05-19,220.98-3,455.80

Finding the Fourth Proportional to 12,815.05, 19,220.98 and 3,455.80

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Solution

The fourth proportional to 12,815.05, 19,220.98 and 3,455.80 is: 5,183.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.05 : 19,220.98 = 3,455.80 : x
  2. Step 2: Convert to fraction form
    12,815.05/19,220.98 = 3,455.80/x
  3. Step 3: Cross multiply
    12,815.05x = 19,220.98 × 3,455.80
  4. Step 4: Simplify right side
    12,815.05x = 66,423,862.68
  5. Step 5: Solve for x
    x = 66,423,862.68/12,815.05
  6. Step 6: Final answer
    x = 5,183.27

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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.