Home / 12,614.78-18,920.82-3,855.80

Finding the Fourth Proportional to 12,614.78, 18,920.82 and 3,855.80

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Solution

The fourth proportional to 12,614.78, 18,920.82 and 3,855.80 is: 5,783.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,614.78 : 18,920.82 = 3,855.80 : x
  2. Step 2: Convert to fraction form
    12,614.78/18,920.82 = 3,855.80/x
  3. Step 3: Cross multiply
    12,614.78x = 18,920.82 × 3,855.80
  4. Step 4: Simplify right side
    12,614.78x = 72,954,897.76
  5. Step 5: Solve for x
    x = 72,954,897.76/12,614.78
  6. Step 6: Final answer
    x = 5,783.29

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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.