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Finding the Fourth Proportional to 28,704.70, 43,057.84 and 7,928.20

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Solution

The fourth proportional to 28,704.70, 43,057.84 and 7,928.20 is: 11,892.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,704.70 : 43,057.84 = 7,928.20 : x
  2. Step 2: Convert to fraction form
    28,704.70/43,057.84 = 7,928.20/x
  3. Step 3: Cross multiply
    28,704.70x = 43,057.84 × 7,928.20
  4. Step 4: Simplify right side
    28,704.70x = 341,371,167.09
  5. Step 5: Solve for x
    x = 341,371,167.09/28,704.70
  6. Step 6: Final answer
    x = 11,892.52

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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.