Home / 8,121.12-11,207.18-4,395.12

Finding the Fourth Proportional to 8,121.12, 11,207.18 and 4,395.12

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Solution

The fourth proportional to 8,121.12, 11,207.18 and 4,395.12 is: 6,065.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.12 : 11,207.18 = 4,395.12 : x
  2. Step 2: Convert to fraction form
    8,121.12/11,207.18 = 4,395.12/x
  3. Step 3: Cross multiply
    8,121.12x = 11,207.18 × 4,395.12
  4. Step 4: Simplify right side
    8,121.12x = 49,256,900.96
  5. Step 5: Solve for x
    x = 49,256,900.96/8,121.12
  6. Step 6: Final answer
    x = 6,065.28

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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.