Home / 12,185.21-18,277.81-3,420.81

Finding the Fourth Proportional to 12,185.21, 18,277.81 and 3,420.81

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Solution

The fourth proportional to 12,185.21, 18,277.81 and 3,420.81 is: 5,131.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.21 : 18,277.81 = 3,420.81 : x
  2. Step 2: Convert to fraction form
    12,185.21/18,277.81 = 3,420.81/x
  3. Step 3: Cross multiply
    12,185.21x = 18,277.81 × 3,420.81
  4. Step 4: Simplify right side
    12,185.21x = 62,524,906.67
  5. Step 5: Solve for x
    x = 62,524,906.67/12,185.21
  6. Step 6: Final answer
    x = 5,131.21

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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.