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Finding the Fourth Proportional to 28,797.90, 39,728.21 and 16,855.97

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Solution

The fourth proportional to 28,797.90, 39,728.21 and 16,855.97 is: 23,253.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,797.90 : 39,728.21 = 16,855.97 : x
  2. Step 2: Convert to fraction form
    28,797.90/39,728.21 = 16,855.97/x
  3. Step 3: Cross multiply
    28,797.90x = 39,728.21 × 16,855.97
  4. Step 4: Simplify right side
    28,797.90x = 669,657,232.99
  5. Step 5: Solve for x
    x = 669,657,232.99/28,797.90
  6. Step 6: Final answer
    x = 23,253.69

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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.