Home / 18,438.55-27,782.20-15,223.66

Finding the Fourth Proportional to 18,438.55, 27,782.20 and 15,223.66

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Solution

The fourth proportional to 18,438.55, 27,782.20 and 15,223.66 is: 22,938.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.55 : 27,782.20 = 15,223.66 : x
  2. Step 2: Convert to fraction form
    18,438.55/27,782.20 = 15,223.66/x
  3. Step 3: Cross multiply
    18,438.55x = 27,782.20 × 15,223.66
  4. Step 4: Simplify right side
    18,438.55x = 422,946,766.85
  5. Step 5: Solve for x
    x = 422,946,766.85/18,438.55
  6. Step 6: Final answer
    x = 22,938.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.