Home / 27,855.42-38,440.62-15,280.20

Finding the Fourth Proportional to 27,855.42, 38,440.62 and 15,280.20

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Solution

The fourth proportional to 27,855.42, 38,440.62 and 15,280.20 is: 21,086.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,855.42 : 38,440.62 = 15,280.20 : x
  2. Step 2: Convert to fraction form
    27,855.42/38,440.62 = 15,280.20/x
  3. Step 3: Cross multiply
    27,855.42x = 38,440.62 × 15,280.20
  4. Step 4: Simplify right side
    27,855.42x = 587,380,361.72
  5. Step 5: Solve for x
    x = 587,380,361.72/27,855.42
  6. Step 6: Final answer
    x = 21,086.75

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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.