Home / 13,161.20-19,745.46-7,321.91

Finding the Fourth Proportional to 13,161.20, 19,745.46 and 7,321.91

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Solution

The fourth proportional to 13,161.20, 19,745.46 and 7,321.91 is: 10,984.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.20 : 19,745.46 = 7,321.91 : x
  2. Step 2: Convert to fraction form
    13,161.20/19,745.46 = 7,321.91/x
  3. Step 3: Cross multiply
    13,161.20x = 19,745.46 × 7,321.91
  4. Step 4: Simplify right side
    13,161.20x = 144,574,382.30
  5. Step 5: Solve for x
    x = 144,574,382.30/13,161.20
  6. Step 6: Final answer
    x = 10,984.90

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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.