Home / 8,120.13-12,172.91-6,742.32

Finding the Fourth Proportional to 8,120.13, 12,172.91 and 6,742.32

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Solution

The fourth proportional to 8,120.13, 12,172.91 and 6,742.32 is: 10,107.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.13 : 12,172.91 = 6,742.32 : x
  2. Step 2: Convert to fraction form
    8,120.13/12,172.91 = 6,742.32/x
  3. Step 3: Cross multiply
    8,120.13x = 12,172.91 × 6,742.32
  4. Step 4: Simplify right side
    8,120.13x = 82,073,620.84
  5. Step 5: Solve for x
    x = 82,073,620.84/8,120.13
  6. Step 6: Final answer
    x = 10,107.43

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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.