Home / 23,121.42-31,940.20-18,399.66

Finding the Fourth Proportional to 23,121.42, 31,940.20 and 18,399.66

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Solution

The fourth proportional to 23,121.42, 31,940.20 and 18,399.66 is: 25,417.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,121.42 : 31,940.20 = 18,399.66 : x
  2. Step 2: Convert to fraction form
    23,121.42/31,940.20 = 18,399.66/x
  3. Step 3: Cross multiply
    23,121.42x = 31,940.20 × 18,399.66
  4. Step 4: Simplify right side
    23,121.42x = 587,688,820.33
  5. Step 5: Solve for x
    x = 587,688,820.33/23,121.42
  6. Step 6: Final answer
    x = 25,417.51

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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.