Home / 13,755.10-18,981.66-7,786.72

Finding the Fourth Proportional to 13,755.10, 18,981.66 and 7,786.72

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Solution

The fourth proportional to 13,755.10, 18,981.66 and 7,786.72 is: 10,745.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.10 : 18,981.66 = 7,786.72 : x
  2. Step 2: Convert to fraction form
    13,755.10/18,981.66 = 7,786.72/x
  3. Step 3: Cross multiply
    13,755.10x = 18,981.66 × 7,786.72
  4. Step 4: Simplify right side
    13,755.10x = 147,804,871.56
  5. Step 5: Solve for x
    x = 147,804,871.56/13,755.10
  6. Step 6: Final answer
    x = 10,745.46

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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.