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Finding the Fourth Proportional to 28,872.80, 43,310.55 and 9,152.90

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Solution

The fourth proportional to 28,872.80, 43,310.55 and 9,152.90 is: 13,729.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,872.80 : 43,310.55 = 9,152.90 : x
  2. Step 2: Convert to fraction form
    28,872.80/43,310.55 = 9,152.90/x
  3. Step 3: Cross multiply
    28,872.80x = 43,310.55 × 9,152.90
  4. Step 4: Simplify right side
    28,872.80x = 396,417,133.10
  5. Step 5: Solve for x
    x = 396,417,133.10/28,872.80
  6. Step 6: Final answer
    x = 13,729.78

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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.