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Finding the Fourth Proportional to 28,512.80, 42,801.60 and 16,832.60

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Solution

The fourth proportional to 28,512.80, 42,801.60 and 16,832.60 is: 25,268.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.80 : 42,801.60 = 16,832.60 : x
  2. Step 2: Convert to fraction form
    28,512.80/42,801.60 = 16,832.60/x
  3. Step 3: Cross multiply
    28,512.80x = 42,801.60 × 16,832.60
  4. Step 4: Simplify right side
    28,512.80x = 720,462,212.16
  5. Step 5: Solve for x
    x = 720,462,212.16/28,512.80
  6. Step 6: Final answer
    x = 25,268.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.