Home / 3,855.11-5,781.14-1,389.07

Finding the Fourth Proportional to 3,855.11, 5,781.14 and 1,389.07

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Solution

The fourth proportional to 3,855.11, 5,781.14 and 1,389.07 is: 2,083.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.11 : 5,781.14 = 1,389.07 : x
  2. Step 2: Convert to fraction form
    3,855.11/5,781.14 = 1,389.07/x
  3. Step 3: Cross multiply
    3,855.11x = 5,781.14 × 1,389.07
  4. Step 4: Simplify right side
    3,855.11x = 8,030,408.14
  5. Step 5: Solve for x
    x = 8,030,408.14/3,855.11
  6. Step 6: Final answer
    x = 2,083.06

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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.