Home / 13,755.12-18,982.47-7,786.68

Finding the Fourth Proportional to 13,755.12, 18,982.47 and 7,786.68

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Solution

The fourth proportional to 13,755.12, 18,982.47 and 7,786.68 is: 10,745.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.12 : 18,982.47 = 7,786.68 : x
  2. Step 2: Convert to fraction form
    13,755.12/18,982.47 = 7,786.68/x
  3. Step 3: Cross multiply
    13,755.12x = 18,982.47 × 7,786.68
  4. Step 4: Simplify right side
    13,755.12x = 147,810,419.50
  5. Step 5: Solve for x
    x = 147,810,419.50/13,755.12
  6. Step 6: Final answer
    x = 10,745.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.