Home / 28,789.20-39,728.16-17,611.20

Finding the Fourth Proportional to 28,789.20, 39,728.16 and 17,611.20

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Solution

The fourth proportional to 28,789.20, 39,728.16 and 17,611.20 is: 24,302.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,789.20 : 39,728.16 = 17,611.20 : x
  2. Step 2: Convert to fraction form
    28,789.20/39,728.16 = 17,611.20/x
  3. Step 3: Cross multiply
    28,789.20x = 39,728.16 × 17,611.20
  4. Step 4: Simplify right side
    28,789.20x = 699,660,571.39
  5. Step 5: Solve for x
    x = 699,660,571.39/28,789.20
  6. Step 6: Final answer
    x = 24,302.88

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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.