Home / 8,121.57-11,207.79-4,395.57

Finding the Fourth Proportional to 8,121.57, 11,207.79 and 4,395.57

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Solution

The fourth proportional to 8,121.57, 11,207.79 and 4,395.57 is: 6,065.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.57 : 11,207.79 = 4,395.57 : x
  2. Step 2: Convert to fraction form
    8,121.57/11,207.79 = 4,395.57/x
  3. Step 3: Cross multiply
    8,121.57x = 11,207.79 × 4,395.57
  4. Step 4: Simplify right side
    8,121.57x = 49,264,625.49
  5. Step 5: Solve for x
    x = 49,264,625.49/8,121.57
  6. Step 6: Final answer
    x = 6,065.90

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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.