Home / 11,121.57-15,361.25-8,794.53

Finding the Fourth Proportional to 11,121.57, 15,361.25 and 8,794.53

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Solution

The fourth proportional to 11,121.57, 15,361.25 and 8,794.53 is: 12,147.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.57 : 15,361.25 = 8,794.53 : x
  2. Step 2: Convert to fraction form
    11,121.57/15,361.25 = 8,794.53/x
  3. Step 3: Cross multiply
    11,121.57x = 15,361.25 × 8,794.53
  4. Step 4: Simplify right side
    11,121.57x = 135,094,929.99
  5. Step 5: Solve for x
    x = 135,094,929.99/11,121.57
  6. Step 6: Final answer
    x = 12,147.11

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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.